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Microevolution: What's An Allele Got to Do With It?: Crash Course Biology #12

Video vocabulary

music

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US / 'mju:zɪk /

UK / ˈmjuzɪk /

A1
  • noun
  • Sounds that are sung or played to give pleasure
  • Academic study of rhythms and sounds
  • Written symbols that represent musical sounds

bottleneck

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US / ˈbɒtlnek /

UK / ˈbɑ:tlnek /

C2
  • noun
  • Become narrow, like a bottleneck

frequency

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US / 'fri:kwənsɪ /

UK / ˈfrikwənsi /

B1
  • noun
  • Number of repetitions of (radio or sound) wave
  • How often something happens

through

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US / θru: /

UK / θru /

A2
  • adjecitve
  • having finished using or doing something
  • adverb
  • From the beginning of something until the end
  • preposition
  • Over, in, across an entire thing or place
  • Allowing you to pass between, or to
  • By a particular way or process; by the use of

stripe

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US / straɪp /

UK / straɪp /

B1
  • noun
  • Strip of alternating color in straight lines

spirit

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US / 'spɪrɪt /

UK / ˈspɪrɪt /

A2
  • noun
  • Person's strong determination or attitude
  • Unique qualities of person, place, or time
  • Part of a person thought to be moved by religion
  • Appearance or sense of a dead person
  • verb
  • To take someone away as if by magic

generation

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US / ˌdʒenəˈreɪʃn /

UK / ˌdʒɛnəˈreʃən /

A2
  • noun
  • Act or process of producing or causing something
  • People born and living at about the same time

short

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US / ʃɔ:t /

UK / ʃɔrt /

A1
  • adverb
  • Less than what is needed
  • Suddenly stopping what you are saying or doing
  • verb
  • (Of electric circuit) to spark because faulty
  • adjecitve
  • Measuring a small distance
  • Happening for a small amount of time
  • Unfriendly or rude

evolve

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US / ɪ'vɒlv /

UK / ɪˈvɑlv /

B1
  • verb
  • To develop certain features
  • To develop or change slowly over time
  • To slowly change or develop into something better

concert

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US / 'kɒnsət /

UK / ˈkɑnˌsɚt, -sət /

A1
  • noun
  • Musical entertainment performed in public

heck

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US / hek /

UK / hɛk /

A1
  • exclamation
  • Expressing surprise, or frustration

mitten

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US / 'mɪtn /

UK / ˈmɪtn: /

C1
  • noun
  • Glove covering the four fingers together and thumb

molecule

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US / ˈmɒlɪkju:l /

UK / ˈmɑlɪˌkjul /

B2
  • noun
  • Two or more atoms chemically combined

but

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US / bət /

UK / bʌt,bət /

A1
  • conjunction
  • Used before you say something different, opposite

randomly

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US / 'rændəmlɪ /

UK / 'rændəmlɪ /

B1
  • adverb
  • With no pattern or clear purpose; by chance

catastrophic

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US / ˌkætə'strɒfɪk /

UK / ˌkætəˈstrɑfɪk /

B2
  • adjecitve
  • Causing a lot of damage or suffering

disease

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US / dɪˈzi:z /

UK / dɪˈziz /

A2
  • noun
  • Illness that affects a person, animal, or plant

development

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US / dɪ'veləpmənt /

UK / dɪˈvɛləpmənt /

A2
  • noun
  • Act or process of growing bigger or more advanced
  • A new event related to a previous event

ship

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US / ʃɪp /

UK / ʃɪp /

A1
  • noun
  • Large boat
  • verb
  • To transport goods by boat, truck or plane

sheer

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US / ʃɪə(r) /

UK / ʃɪr /

B1
  • adjecitve
  • (Of luck/stupidity) very complete or absolute
  • (Of fabric) very fine or thin; see-through
  • adverb
  • Straight up and down; steeply
  • verb
  • To suddenly turn or change direction

member

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US / ˈmembə(r) /

UK / ˈmɛmbɚ /

A1
  • noun
  • Part of the body of a human, animal
  • Person or thing belonging to a group or team

cloud

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US / klaʊd /

UK / klaʊd /

A1
  • noun
  • A mass of smoke or mist hanging in the air
  • verb
  • To confuse the mind/judgment of a person
  • (Of the sky) to get darker and fill with clouds
  • To make (glass, etc.) difficult to see through
  • To make an activity less pleasant or enjoyable
  • (Of person's face, etc.) to show worry/anger

expect

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US / ɪk'spekt /

UK / ɪkˈspɛkt /

A1
  • verb
  • To believe something is probably going to happen

baseline

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US / ˈbeɪslaɪn /

UK / ˈbeɪslaɪn /

C1
  • noun
  • Imaginary standard by which things are compared

want

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US / wɔnt /

UK / wɑnt, wɔnt /

A1
  • noun
  • Something you desire or wish for
  • State or condition of poverty
  • verb
  • To desire or wish for something; hope for a thing

whole

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US / həul /

UK / hol /

A1
  • adjecitve
  • Complete or full; all of
  • Being in a good condition
  • noun
  • Complete amount or sum; total

powerful

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US / ˈpauəful /

UK / ˈpaʊəfəl /

A2
  • adjecitve
  • Having control or influence over
  • Having a lot of physical force, energy, strength

can

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US / kæn /

UK / kən,kæn /

A1
  • noun
  • A metal container for storing food
  • other
  • Able to; have the skill to; have the time to
  • verb
  • To have permission to
  • To be possible to do
  • To preserve food by sealing it in a metal container

survive

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US / sə'vaɪv /

UK / sɚˈvaɪv /

A2
  • verb
  • To continue to live despite illness or trouble

exceedingly

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US / ɪkˈsi:dɪŋli /

UK / ɪkˈsidɪŋli /

B1
  • adverb
  • To an extreme degree

blue

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US / blu: /

UK / blu /

A1
  • adjecitve
  • Color of the clear sky
  • Feeling sad or down

our

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US / 'aʊə(r) /

UK / aʊr /

A1
  • determiner
  • Belonging to us

yellow

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US / ˈjeləʊ /

UK / ˈjeloʊ /

A1
  • adjecitve
  • Color of lemons or the sun
  • Lacking in courage; cowardly (used as an INSULT)
  • verb
  • To turn yellow, often due to being old

why

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US / waɪ /

UK / hwaɪ, waɪ /

A1
  • adverb
  • Question word to ask for a reason
  • exclamation
  • (Used to express surprise or approval)

depend

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US / dɪˈpend /

UK / dɪˈpend /

B1
  • verb
  • Be controlled or determined by (someone/something)

split

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US / splɪt /

UK / splɪt /

A2
  • adjecitve
  • No longer married or in a relationship
  • (Injured) by cutting it open, as in someone's lip
  • (Of a decision) when people cannot decide a winner
  • noun
  • Difference of opinion in a group causing a break
  • Separation or a break in something
  • verb
  • To become divided or broken along a straight line
  • To cause a cut in (lip, etc.)
  • To have difference of opinion in a group
  • To separate into two or more pieces
  • To divide something in an even or fair way

individual

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US / ˌɪndɪˈvɪdʒuəl /

UK / ˌɪndəˈvɪdʒuəl /

A2
  • adjecitve
  • Made for use by one single person
  • Having a distinct manner different from others
  • noun
  • Single person, looked at separately from others

chromosome

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US / ˈkrəʊməsəʊm /

UK / ˈkroʊməsoʊm /

C2
  • noun
  • Cell structures that carry the genetic material

cool

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US / ku:l /

UK / kul /

A1
  • adjecitve
  • Steady and calm when facing difficulties
  • Almost cold; not warm or hot
  • Smart or stylish in a way (young) people admire
  • Unfriendly in an indirect way; distant
  • verb
  • To make something decrease in temperature
  • (Of an emotion, etc.) to become less strongly felt

ocean

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US / 'əʊʃn /

UK / ˈoʃən /

A2
  • noun
  • Large body of salt water; a large sea

nudge

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US / nʌdʒ /

UK / nʌdʒ /

B2
  • verb
  • To touch or push something gently

field

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US / fi:ld /

UK / fild /

A1
  • noun
  • Area of study, such as physics or biology
  • Piece of land used to grow crops/raise animals
  • Open area of land, especially without buildings
  • Grassed area where you play some sports
  • verb
  • To respond to something or answer a question
  • To catch or stop a ball during a game

within

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US / wɪˈðɪn /

UK / wɪðˈɪn, wɪθ- /

A1
  • adverb
  • Inside the limits of an area, time or range
  • preposition
  • From the inside of something

talk

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US / tɔ:k /

UK / tɔk /

A1
  • noun
  • Style of speaking
  • Discussion between two countries
  • Giving information in front of people; lecture
  • Saying things or ideas to someone with words
  • verb
  • To make a formal speech about something
  • To say things or ideas to someone with words

sorry

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US / ˈsɒri /

UK / ˈsɑ:ri /

A1
  • exclamation
  • What you say to admit you were wrong
  • adjecitve
  • Causing others to feel pity; poor
  • Feeling regret or sympathy about wrong thing

stuff

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US / stʌf /

UK / stʌf /

A1
  • noun
  • Generic description for things, materials, objects
  • verb
  • To push material inside something, with force

special

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US / 'speʃl /

UK / ˈspɛʃəl /

A1
  • adjecitve
  • Being additional or extra
  • Different, better or greater than normal
  • noun
  • Heavily discounted sales item

such

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US / sʌtʃ /

UK / sʌtʃ /

A1
  • determiner
  • Being similar to
  • (Thing) as previously stated or referred to
  • adverb
  • (Used to emphasize the quality of an adjective)

strong

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US / strɒŋ /

UK / strɔŋ /

A1
  • adjecitve
  • (Of tea or beer) dark or thick
  • Having big muscles; physically powerful

die

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US / daɪ /

UK / daɪ /

A1
  • noun
  • Cube with dots numbering 1-6 on it used in games
  • verb
  • To cease to function or work
  • (Of a thing) to stop being used or done
  • (Of a person) to stop living

undergo

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US / ˌʌndəˈgəʊ /

UK / ˌʌndərˈgoʊ /

B1
  • verb
  • To experience or endure something (bad)

well

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US / wel /

UK / wɛl /

A1
  • adjecitve
  • Being in a fortunate, good condition or state
  • Healthy and in good condition
  • adverb
  • In an acceptable, proper, or successful manner
  • In a complete, total, or full manner
  • A great and considerable degree
  • In a successful way, in a good or satisfactory way
  • exclamation
  • Used to begin or continue a particular statement
  • Used to show you want to start saying something
  • Used to express that you are waiting for a reply
  • You say this to change the topic of a conversation
  • Used to indicate you are making a final remark
  • noun
  • Long deep hole in the ground to get water
  • verb
  • To cause your eyes to fill with tears

columbia

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US / kə'lʌmbɪə /

UK / kə'lʌmbi:ə /

A1
  • noun
  • A North American river; rises in southwestern Canada and flows southward across Washington to form t

counteract

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US / ˌkaʊntərˈækt /

UK / ˌkaʊntɚˈækt /

C1
  • verb
  • To reduce the impact doing something opposite

express

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US / ɪk'spres /

UK / ɪkˈsprɛs /

A1
  • adjecitve
  • Sent by a fast mail service
  • Traveling at high speed
  • noun
  • Fast train or bus
  • verb
  • To send something by fast mail
  • To state or show what you think or how you feel

enthusiasm

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US / ɪnˈθju:ziæzəm /

UK / ɛnˈθuziˌæzəm /

B1
  • noun
  • Hobby or interest that you are passionate about
  • Great interest and excitement in something

occur

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US / əˈkɜ:(r) /

UK / əˈkɚ /

A2
  • verb
  • To come to pass or to happen

period

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US / ˈpɪəriəd /

UK / ˈpɪriəd /

A1
  • noun
  • Set amount of time during which events take place
  • A way to emphasize what you will say
  • A full stop (.), marking the end of a sentence
  • A menstrual cycle
  • A set time for a class to be held

rich

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US / rɪtʃ /

UK / rɪtʃ /

A1
  • adjecitve
  • Having a lot of money or valuable possessions
  • Containing a lot of exciting events or experiences and therefore very interesting
  • (of a color, sound, smell, etc.) Pleasantly deep or strong
  • If food is rich, it contains a large amount of oil, butter, eggs, or cream.

much

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US / mʌtʃ /

UK / mʌtʃ /

A1
  • adjecitve
  • Very; to a high level or degree
  • adverb
  • A lot; large amount; a high degree of
  • Nearly; basically
  • On many occasions; often
  • noun
  • A large amount; a great quantity

shade

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US / ʃeɪd /

UK / ʃed /

A2
  • noun
  • Area of darkness when something blocks the light
  • Something that blocks or reduces light
  • Color that is a little darker or brighter than
  • verb
  • To shelter something from direct light
  • To change the truth to deceive or influence
  • To make one part of a picture darker or lighter

job

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US / dʒɒb /

UK / dʒɑ:b /

A1
  • noun
  • Something that must be done
  • Regular work at which you earn money

few

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US / fju: /

UK / fju /

A1
  • pronoun
  • Not many, a small number

salmon

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US / ˈsæmən /

UK / ˈsæmən /

B1
  • noun
  • Light pinkish orange color
  • Large fish with silver skin and pink flesh

selection

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US / sɪˈlekʃn /

UK / sɪˈlɛkʃən /

A2
  • noun
  • Process of choosing someone or something carefully
  • Something chosen carefully from a larger group
  • Range or variety of things you can choose from

begin

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US / bɪ'ɡɪn /

UK / ˈbeɡɪn /

A1
  • verb
  • To do the first part of an action; to start

pair

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US / peə(r) /

UK / per /

A2
  • noun
  • Two of the same thing, e.g. socks
  • Two people viewed together for some reason; couple
  • verb
  • To put two things or people together

grow

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US / ɡrəʊ /

UK / ɡro /

A1
  • verb
  • To get bigger and more mature; make plants do this
  • To improve; to develop better skills over time
  • To develop and become bigger or taller over time

anywhere

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US / ˈeniweə(r) /

UK / ˈeniwer /

A1
  • adverb
  • To any extent or degree (often used with not)
  • In, at or to any place
  • other
  • Use to indicate limits or variation

set

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US / set /

UK / sɛt /

A1
  • adjecitve
  • Prepared for something; ready
  • noun
  • Complete group of something
  • Place where a television show or movie is filmed
  • Group of games in a tennis match
  • Device that receives radio or television signals
  • verb
  • To make a clock state or ring at a particular time
  • To decide upon or choose something
  • To make something ready for use (e.g. table)
  • To decide on a price for something
  • To become hard (of glue, concrete etc.)
  • To be located in a specific place or time
  • To put (e.g. a vase) down carefully in a place
  • To put someone in a certain condition or state
  • (Of the sun) to go lower than the horizon

time

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US / taɪm /

UK / taɪm /

A1
  • noun
  • Speed at which music is played; tempo
  • Point as shown on a clock, e.g. 3 p.m
  • Number of hours, minutes needed to do something
  • Occasion when something happens
  • Period or occasion that something occurred
  • Period in history or the past
  • Something measured in minutes, hours, days, etc.
  • How long an event takes; duration
  • verb
  • To check speed at which music is performed
  • To choose a specific moment to do something
  • To measure how long an event takes, e.g. a race
  • To schedule something to occur at a specific moment

responsible

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US / rɪ'spɒnsəbl /

UK / rɪˈspɑnsəbəl /

A2
  • adjecitve
  • Being the cause of something that has occurred
  • Having the duty of dealing with something
  • Able to be trusted to do what needs to be done

nation

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US / 'neɪʃn /

UK / ˈneʃən /

A1
  • noun
  • Area or region controlled by a government and army

for

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US / fə(r) /

UK / fɔr,fə /

A1
  • preposition
  • Used to show the purpose, or need of something

fact

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US / fækt /

UK / fækt /

A1
  • noun
  • Something that is known or proved to be true

bubble

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US / ˈbʌbl /

UK / ˈbʌbəl /

B1
  • noun
  • A small ball of air inside of a liquid
  • verb
  • (Of a liquid) to produce bubbles, as when boiling
  • To show intense emotion, e.g. excitement, anger

range

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US / reɪndʒ /

UK / rendʒ /

A2
  • noun
  • Cooking stove with multiple burners
  • Given distance from a point; how far plane can fly
  • Large grassy area where cattle wander and feed
  • Group or chain of mountains
  • Set of things with something in common
  • Limits within which something extends or varies
  • A set of products, e.g. so that people can choose
  • verb
  • To cover an area from one point to another
  • To extend to or vary within given limits
  • To put things in a row or in line
  • To wander or explore

those

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US / ðəʊz /

UK / ðoz /

A1
  • determiner
  • The people or things we are talking about
  • pronoun
  • The objects far from the speaker

just

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US / dʒʌst /

UK / dʒʌst /

A1
  • adjecitve
  • Proper or appropriate; as is deserved
  • Doing or being what is right or fair
  • Legally correct; having enough evidence
  • adverb
  • Almost; nearly
  • Exactly at the time of
  • Exactly (the same as, like)

indiana

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US / ˈindiˈænə /

UK / ˌɪndiˈænə /

A1
  • noun
  • A state in midwestern United States

determine

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US / dɪ'tɜ:mɪn /

UK / dɪˈtɚmɪn /

A2
  • verb
  • To control exactly how something will be or act
  • To establish the facts about; discover

necessarily

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US / ˌnesəˈserəli /

UK / ˌnɛsɪˈsɛrəli, -ˈsɛr- /

A2
  • adverb
  • In a way that is needed/required/is unavoidable

specifically

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US / spəˈsɪfɪkli /

UK / spəˈsɪfɪkli /

A2
  • adverb
  • As regards a particular thing; closely related to
  • In particular

hunt

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US / hʌnt /

UK / hʌnt /

A2
  • noun
  • A search for animals to kill for food
  • Person's name
  • verb
  • To search for wild animals to kill (for food)
  • To look for very carefully; search for

seal

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US / si:l /

UK / sil /

B1
  • noun
  • Large fish-eating animal that lives on sea or land
  • Official mark made in hot wax to close a document
  • Piece of rubber used to keep water, dirt out
  • verb
  • To close tightly to protect it from leaking
  • To close an envelop or package
  • To cover a surface with a substance to protect it

rip

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US / rɪp /

UK / rɪp /

B1
  • noun
  • A long tear in something, e.g. a piece of cloth
  • verb
  • To tear or split roughly or cause to tear or split
  • To become torn, opened, or split apart forcefully
  • To remove or take by pulling it forcefully

unique

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US / jʊ'ni:k /

UK / juˈnik /

A2
  • adjecitve
  • Unlike other things; being the only one like it

shoot

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US / ʃu:t /

UK / ʃut /

A2
  • noun
  • Emerging new part of a plant
  • verb
  • To kick or throw a ball at a goal
  • To fire a gun; injure or kill someone with a gun
  • To (cause to) fly away forcefully
  • To use a camera to record a film/take a photograph

black

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US / blæk /

UK / blæk /

A1
  • adjecitve
  • Color of the sky on a dark night
  • noun
  • A person with dark skin, often of African origin
  • Person's name
  • verb
  • To fill in something to make it a very dark color

equation

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US / ɪˈkweɪʒn /

UK / ɪˈkweʒən, -ʃən /

B1
  • noun
  • Mathematical statement showing things to be equal
  • Complex set of different facts, ideas or issues

never

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US / 'nevə(r) /

UK / ˈnɛvɚ /

A1
  • adverb
  • Not ever; not at any time

since

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US / sɪns /

UK / sɪns /

A1
  • adverb
  • At a point before the present time
  • conjunction
  • For this reason; because
  • preposition
  • From the time in the past that

tropical

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US / ˈtrɒpɪkl /

UK / ˈtrɑpɪkəl /

B1
  • adjecitve
  • Hot and humid; near to the equator

power

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US / 'paʊə(r) /

UK / ˈpaʊɚ /

A1
  • noun
  • Legal or official right to perform certain actions
  • Ability to move forcefully and quickly
  • Energy of something (e.g. electricity or fuel)
  • Mathematical way to multiply a number
  • Condition of being in political control
  • Physical force, energy, and strength
  • verb
  • To give energy to something, e.g. by electricity
  • To move something forcefully and quickly

classroom

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US / ˈklɑ:sru:m /

UK / ˈklæsˌrum, -ˌrʊm /

A1
  • noun
  • Room in a school where lessons take place

also

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US / 'ɔ:lsəʊ /

UK / ˈɔlso /

A1
  • adverb
  • In addition; too; in a similar way

broad

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US / brɔ:d /

UK / brɔd /

A2
  • adjecitve
  • General; not detailed
  • Wide; from the shorter two sides to the other

park

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US / pɑ:k /

UK / pɑ:rk /

A1
  • noun
  • Person's name
  • Public green area in a town for exercise, relaxing
  • Field upon which a sport is played, e.g. baseball
  • verb
  • To stay still without moving
  • To leave your car, bike in a certain place

newly

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US / ˈnu:li:, ˈnju:- /

UK / ˈnuli, ˈnju- /

A2
  • adverb
  • Very recently; just done or made

actively

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US / 'æktɪvlɪ /

UK / 'æktɪvlɪ /

A2
  • adverb
  • Doing things to achieve a specific goal

word

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US / wɜ:d /

UK / wɚd /

A1
  • noun
  • Unit of language that has a meaning
  • Promise
  • Short remark or piece of information
  • verb
  • To express something by choosing particular words

make

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US / meɪk /

UK / mek /

A1
  • noun
  • Product made by a particular company; brand
  • verb
  • To arrange or prepare something e.g. dinner
  • To get to (a place) on time
  • To gain the status of (teacher, lawyer, etc.)
  • To create something by putting things together
  • To earn a certain amount of money at a job
  • To cause or force a person to do something
  • To cause something to happen or be formed

mutation

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US / mju:'teɪʃn /

UK / mjuˈteʃən /

B2
  • noun
  • Change that changes genetic structure

climate

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US / ˈklaɪmət /

UK / ˈklaɪmɪt /

A2
  • noun
  • Typical weather conditions in a particular place

big

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US / bɪɡ /

UK / bɪɡ /

A1
  • adjecitve
  • Popular
  • Serious
  • Large

forest

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US / 'fɒrɪst /

UK / ˈfɔrɪst, ˈfɑr- /

A1
  • noun
  • Large area with many trees

term

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US / tɜ:m /

UK / tɚm /

A1
  • noun
  • Conditions applying to an agreement, contract
  • Length of time something is expected to happen
  • Fixed period of weeks for learning at school
  • The (precise) name given to something
  • verb
  • To call; give a name to

little

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US / 'lɪtl /

UK / ˈlɪtl /

A1
  • adjecitve
  • Being short in length of time
  • Not great in size, amount, or degree; small
  • Being very young or younger than others
  • adverb
  • By an amount or degree that is not very much
  • Not often; rarely
  • noun
  • A person's name

you

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US / jʊ /

UK / ju /

A1
  • pronoun
  • Person someone is speaking or writing to
  • Person or people in general

vary

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US / ˈveəri /

UK / ˈveri /

A2
  • verb
  • To change something and make it different
  • To be changeable, both up and down

play

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US / pleɪ /

UK / pleɪ /

A1
  • noun
  • Loose, free movement between two objects
  • Single action in a sports game
  • Performance in which people act in a theater
  • verb
  • To act as a character in a movie, or on stage
  • To perform music on an instrument
  • To use a device, e.g. a video game
  • To do something for enjoyment and fun
  • To do or perform a game or sport

natural

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US / ˈnætʃərəl /

UK / ˈnætʃərəl, ˈnætʃrəl /

A1
  • adjecitve
  • Being as one would expect; being usual or normal
  • Not made by humans; without human intervention

genetic

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US / dʒəˈnetɪk /

UK / dʒəˈnɛtɪk /

B1
  • adjecitve
  • Of, relating to, or controlled by genes

across

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US / əˈkrɔs /

UK / əˈkrɔs,əˈkrɑs /

A1
  • adverb
  • Distance from one side to another
  • (Go) from one side to the other of something

fungus

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US / ˈfʌŋgəs /

UK / ˈfʌŋɡəs /

B2
  • other
  • Plant, e.g. mushroom/mold, growing in damp places

other

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US / 'ʌðə(r) /

UK / ˈʌðər /

A1
  • adjecitve
  • A thing different from that mentioned
  • determiner
  • (Something) else; not the first (one)
  • pronoun
  • Being the one and only thing of that category

may

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US / meɪ /

UK / me /

A1
  • noun
  • 5th month of the year
  • other
  • Used to express a desire
  • Expresses permission, possibility or probability
  • Used to show that a thing could be true

entire

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US / ɪn'taɪə(r) /

UK / ɛnˈtaɪr /

A2
  • adjecitve
  • Complete or full; with no part left out; whole

live

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US / lɪv /

UK / liv /

A1
  • adjecitve
  • Being broadcast as events happen, not recorded
  • Carrying electric current; able to give a shock
  • Glowing because burning; hot
  • Not yet killed (for food)
  • adverb
  • (Music, drama) as it is performed
  • verb
  • To be alive
  • To experience a particular type of life
  • To make your home in a house or town

mate

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US / meɪt /

UK / met /

B1
  • noun
  • A friend who you work, live, or go to school with
  • Partner in a (sexual) relationship
  • One of a matched pair e.g. a shoe or glove
  • A kind of officer on a ship
  • other
  • Person your wish to, or are married to
  • verb
  • To pair a male and female so they have children
  • To join or fit two things together

bottle

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US / 'bɒtl /

UK / ˈbɑtl /

A1
  • noun
  • Container with a narrow neck used to hold liquids
  • verb
  • To put something into a bottle to store it

indigenous

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US / ɪnˈdɪdʒənəs /

UK / ɪnˈdɪdʒənəs /

B1
  • adjecitve
  • Being naturally from an area, not somewhere else

than

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US / ðən /

UK / ðən /

A1
  • conjunction
  • Used to compare two things that are not equal

might

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US / maɪt /

UK / maɪt /

A1
  • other
  • Used to politely request an action
  • Used to express that something could happen
  • Power, strength, force or influence

lead

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US / li:d /

UK / lid /

A1
  • adjecitve
  • Being the main part in movies or plays
  • noun
  • Wire for electricity, computer, etc.; cable
  • Information that could help to solve a crime
  • Main part in a play or movie
  • Heavy, gray metal element
  • Rope used to tie something to stop it escaping
  • Act of being at the front in a race or game
  • verb
  • To show the way or guide others
  • To be at the front of a race or game
  • To travel in front of; go in advance of others

the

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US / ðə /

UK / ðə /

A1
  • article
  • Used to refer to something already mentioned
  • Used to show there is only one of something
  • determiner
  • Used to describe all of a family

specific

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US / spəˈsɪfɪk /

UK / spɪˈsɪfɪk /

A2
  • adjecitve
  • Precise; particular; just about that thing
  • Concerning one particular thing or kind of thing

odour

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US / ˈəʊdə(r) /

UK / ˈodɚ /

B1
  • noun
  • A certain smell, often strong or distinct

rock

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US / rɒk /

UK / rɑk /

A1
  • noun
  • Type of popular music with a strong, loud beat
  • Strong, tough person who can be relied upon
  • Big stone; hard, solid substance forming mountains
  • verb
  • To be greatly upset by something, e.g. a death
  • To be extremely effective or pleasing
  • To play, sing along with, or dance to heavy music
  • To move back and forth or from side to side

theme

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US / θi:m /

UK / θim /

A2
  • noun
  • An main or dominant idea, motif
  • Main idea of a work of art, writing, or music
  • Main subject being discussed or described

order

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US / 'ɔ:də(r) /

UK / ˈɔrdɚ /

A1
  • noun
  • Religious or social group, as of nuns
  • Instructions to others to do what you want
  • State in which things are neat and organized
  • What you ask to buy, e.g. food in restaurant
  • Social or political control of an area
  • verb
  • To put things in a sequence, e.g. a, b, c
  • To give instructions to others to do what you want
  • To ask for something you want to buy, e.g. a meal

trader

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US / 'treɪdə(r) /

UK / ˈtredɚ /

A2
  • noun
  • Someone who buys and sells stocks

ready

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US / 'redɪ /

UK / ˈrɛdi /

A1
  • adjecitve
  • Being likely or about to do something
  • Being willing to do a task
  • verb
  • To prepare something for use or action

theoretical

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US / ˌθɪəˈretɪkl /

UK / ˌθiəˈrɛtɪkəl /

B1
  • adjecitve
  • Concerning the unproved aspects of a subject

this

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US / ðɪs /

UK / ðɪs /

A1
  • adjecitve
  • Used to indicate something already been discussed
  • Used to indicate something happening around now
  • adverb
  • An indication by a physical motion or gesture
  • A specific amount of
  • determiner
  • Person, thing, or idea near you
  • pronoun
  • Person, thing that has already been discussed

let

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US / let /

UK / lɛt /

A1
  • verb
  • To allow someone to do something
  • Introducing a suggestion to do something together
  • To rent a house, etc. to others

peach

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US / pi:tʃ /

UK / pitʃ /

B2
  • noun
  • Round sweet furry fruit that grows on trees
  • Very good

free

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US / fri: /

UK / fri /

A1
  • adjecitve
  • Living, happening without being controlled
  • Costing no money
  • Not working; not busy
  • verb
  • To release (e.g. bird) from a cage or prison

able

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US / 'eɪbl /

UK / ˈebəl /

A2
  • adjecitve
  • Skilled; good at something
  • Having the ability to do something

patreon

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US / 'peɪʃənts /

UK / 'peɪʃənts /

A1

chemical

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US / ˈkemɪkl /

UK / ˈkɛmɪkəl /

A2
  • adjecitve
  • Made of various elements
  • noun
  • Basic substance produced by mixing elements

level

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US / 'levl /

UK / ˈlɛvəl /

A2
  • adjecitve
  • (Sports) equal to another
  • Being steady and determined (e.g. a voice)
  • noun
  • Specific height of something
  • Amount of ability you have compared to others
  • Floor or deck within a building
  • Tool used to determine if something is lying flat
  • verb
  • To aim a gun at someone
  • To destroy a building; flatten an area completely
  • To make things flat or even
  • To make a score equal to another, in sports

aww

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US / /

UK / /

A1
  • exclamation

instruction

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US / ɪn'strʌkʃn /

UK / ɪnˈstrʌkʃən /

A2
  • noun
  • A command for someone formally to do something
  • Act of teaching or explaining to others
  • Information about how to do or use something

material

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US / məˈtɪəriəl /

UK / məˈtɪriəl /

A2
  • adjecitve
  • Relevant; (of evidence) important or significant
  • Belonging to the world of physical things
  • noun
  • Cloth; fabric
  • Supplies or data needed to do a certain thing
  • Substance from which a thing is made of

one

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US / wʌn /

UK / wʌn /

A1
  • pronoun
  • You; we; people in general; someone
  • The thing or person previously referred to
  • adjecitve
  • Used to refer to people generally
  • Being a strong example of (something mentioned)
  • number
  • Number 1

multiple

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US / ˈmʌltɪpl /

UK / ˈmʌltəpəl /

B1
  • adjecitve
  • Having or involving more than one of something
  • noun
  • Number produced by multiplying a smaller number
  • Shop with many branches

fate

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US / feɪt /

UK / fet /

B1
  • noun
  • What will happen to you in the future, often bad
  • Power that determines what happens; destiny

kind

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US / kaɪnd /

UK / kaɪnd /

A1
  • adjecitve
  • In a caring and helpful manner
  • friendly and considerate
  • noun
  • One type of thing

outside

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US / ˌaʊtˈsaɪd /

UK / aʊtˈsaɪd, ˈaʊtˌsaɪd /

A2
  • adverb
  • Beyond the limits or edges of some place, thing
  • noun
  • Area around or near something, such as a building
  • preposition
  • Beyond the limits or edges of some place, thing

into

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US / 'ɪntə /

UK / ˈɪntu /

A1
  • preposition
  • Moving or going inside something
  • In the same direction as; in the direction of
  • So as to become; taking the state of

how

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US / haʊ /

UK / haʊ /

A1
  • adjecitve
  • To what degree? in what amount?
  • adverb
  • (Used to explain the way to do something)
  • exclamation
  • For what purpose or reason?
  • (Used to ask someone or something's condition)

reverse

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US / rɪ'vɜ:s /

UK / rɪˈvɚs /

B1
  • noun
  • Setting that makes the vehicle go backward
  • (Drive a vehicle) backward gear of a vehicle
  • Instance of a significant change, for the worse
  • In a backwards order
  • Back part or side of something
  • verb
  • To drive a vehicle backward
  • To change to an opposite state, way or condition
  • To change back to a previous or normal condition
  • To change something to its opposite

adapt

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US / ə'dæpt /

UK / əˈdæpt /

B1
  • verb
  • To change something for a different function
  • To change something to fit or suit a new purpose

three

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US / θri: /

UK / θri /

A1
  • number
  • Number 3

parent

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US / 'peərənt /

UK / ˈpɛrənt, ˈpær- /

A1
  • noun
  • Person's, animal's mother or father
  • Something creating other things of the same kind

mammal

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US / 'mæml /

UK / ˈmæməl /

B1
  • noun
  • Animal which drinks milk from its mother

imagine

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US / ɪ'mædʒɪn /

UK / ɪˈmædʒɪn /

A1
  • verb
  • To think creatively about; form mental picture of

quick

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US / kwɪk /

UK / kwɪk /

A1
  • adjecitve
  • Using very little time; moving far in little time
  • Learning and understanding rapidly and easily

probably

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US / ˈprɒbəbli /

UK / ˈprɑbəbli /

A1
  • adverb
  • That is likely to happen or be true

while

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US / waɪl /

UK / hwaɪl, waɪl /

A1
  • conjunction
  • In spite of the fact that; although
  • During the time that; at the same time
  • noun
  • Short amount of time

point

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US / pɔɪnt /

UK / pɔɪnt /

A1
  • noun
  • An item to be discussed
  • Small spot or dot
  • Fact or detail
  • Feature of something
  • The size of the text on a page or screen
  • A certain time or stage in a process
  • Certain position in time or space
  • Idea or fact you try to convince people about
  • Measurement of scores in a game, sport
  • Sharp end of something, e.g. a pen or pin
  • verb
  • To face a certain direction, e.g. north
  • To indicate something with your finger to others

totally

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US / ˈtəʊtəli /

UK / ˈtotl:ɪ /

A1
  • adverb
  • In a complete way; completely; absolutely

new

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US / nju: /

UK / nu, nju /

A1
  • adjecitve
  • Not old, recently born, built or made
  • Being or doing something for the first time
  • Not felt, seen or known previously
  • Having been recently bought or obtained

always

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US / 'ɔ:lweɪz /

UK / ˈɔlwez,-wɪz,-wiz /

A1
  • adverb
  • For a very long time
  • At all times; in every situation
  • For ever

flow

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US / fləʊ /

UK / flo /

A2
  • noun
  • Amount of something that moves through an area
  • verb
  • To move steadily and easily in a certain direction

matter

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US / 'mætə(r) /

UK / ˈmætɚ /

A1
  • noun
  • Material all things are made of that fills space
  • Problem or reason for concern
  • verb
  • To be of great importance; to count

spontaneously

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US / spɒn'teɪnɪəslɪ /

UK / spɔnˈtenɪəslɪ /

B1
  • adverb
  • In a sudden, unplanned way

white

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US / waɪt /

UK / hwaɪt, waɪt /

A1
  • adjecitve
  • Belonging to a race of people with light skin
  • Of the color of fresh snow and milk
  • noun
  • Person's name
  • Lightest color; The color of fresh snow.

ever

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US / 'evə(r) /

UK / ˈɛvɚ /

A1
  • adverb
  • At any time; at all times in the future

population

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US / ˌpɒpjuˈleɪʃn /

UK / ˌpɑpjəˈleʃən /

A2
  • noun
  • Number of people who live in a country, area etc.

sure

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US / ʃʊə(r) /

UK / ʃʊr /

A1
  • adjecitve
  • Having no doubts about something
  • Have confidence in your own words or actions
  • Firmly established or held; being firm or stable
  • Being correct or true
  • adverb
  • What you say to agree willingly

code

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US / kəʊd /

UK / kod /

A2
  • noun
  • A password made of a set of letters or numbers
  • Set of rules for behavior
  • A secret language using secret symbols
  • Written part of a computer program
  • verb
  • To express information in a series of numbers
  • To write a secret message using secret symbols
  • To write programs using computer languages

forth

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US / fɔ:θ /

UK / fɔrθ, forθ /

B1
  • adverb
  • So as to be seen; out
  • Outward or forward in space, time

series

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US / ˈsɪəri:z /

UK / ˈsɪriz /

A1
  • noun
  • Set of stories or articles on a particular subject
  • other
  • Number of things that happen one after another

somehow

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US / ˈsʌmhaʊ /

UK / ˈsʌmˌhaʊ /

A1
  • adverb
  • In a way that is not known or certain

too

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US / tu: /

UK / tu /

A1
  • adverb
  • In addition, also; with emphasis
  • Say that something is more than you want

sherbert

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US / ˈʃɜːbɜːt /

UK / /

C2
  • noun
  • Frozen dessert made primarily of fruit juice

devolve

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US / dɪ'vɒlv /

UK / dɪˈvɑlv /

B2
  • verb
  • To transfer power, responsibility or rights

episode

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US / 'epɪsəʊd /

UK / ˈɛpɪˌsod /

B1
  • noun
  • One separate event in a series of events
  • Show which is part of a larger story

use

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US / ju:s /

UK / ju:s /

A1
  • noun
  • Ability to employ something
  • Need to enable it to work
  • Permission to do something with something
  • Act of spending money
  • Operation of a machine for its function
  • verb
  • To have; to eat, drink, consume etc.
  • To need to operate or work
  • To operate a machine, e.g. a computer
  • To treat a person badly
  • To do something with, for a task or purpose

area

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US / 'eərɪə /

UK / ˈɛriə /

A1
  • noun
  • Amount of measured space
  • A specific section or space; part of a region
  • A subject or field of study

divide

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US / dɪ'vaɪd /

UK / dɪˈvaɪd /

A2
  • verb
  • To split numbers by another number, e.g. 6 / 2 = 3
  • To separate something into equal pieces

small

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US / smɔ:l /

UK / smɔl /

A1
  • adjecitve
  • Little in size; not big
  • (Of letters) not written in capital letters
  • Being insignificant or minor
  • (Of a business) with few people or things; local
  • (Of voice) being soft and quiet
  • (Of a child) being young

cruise

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US / kru:z /

UK / kruz /

B1
  • noun
  • A long vacation trip on a passenger boat
  • verb
  • To easily achieve
  • To travel by boat or car for leisure

gene

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US / dʒi:n /

UK / dʒin /

B1
  • noun
  • Part of cell controlling development of a thing

develop

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US / dɪ'veləp /

UK / dɪˈvɛləp /

A1
  • verb
  • To explain something in steps and in detail
  • To create or think of something
  • To grow bigger, more complex, or more advanced
  • To make a photograph from film

rainbow

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US / ˈreɪnbəʊ /

UK / ˈreɪnboʊ /

B1
  • noun
  • Curved line of colors in the sky during rainfall

colony

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US / 'kɒlənɪ /

UK / ˈkɑləni /

B2
  • noun
  • Group (bees, etc.) that live in the same place
  • Country/settlement controlled by another country

will

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US / wɪl /

UK / wɪl /

A1
  • noun
  • Desire or choice of someone
  • Document saying who gets your money when you die
  • Strong desire to do something; determination
  • Desire to do something; strong wish to do
  • other
  • Used with verbs to express the future
  • verb
  • To leave property to someone after your death
  • To use mental effort to make something happen
  • Am (is, are) likely to do
  • To influence someone to do something
  • To make something happen by strongly wanting it

actually

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US / ˈæktʃuəli /

UK / ˈæktʃuəli /

A1
  • adverb
  • Used to add new (often different) information

visit

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US / ˈvɪzɪt /

UK / ˈvɪzɪt /

A1
  • noun
  • Trip to a place for a time, usually for a reason
  • verb
  • To go to a place for a time, usually for a reason

descend

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US / dɪˈsend /

UK / dɪˈsɛnd /

B1
  • verb
  • To go down; to move from a higher to a lower place

successfully

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US / sək'sesfəlɪ /

UK / səkˈsɛsfəlɪ /

A2
  • adverb
  • In a manner that achieves a goal

many

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US / 'menɪ /

UK / ˈmɛni /

A1
  • determiner
  • Used to refer a large number of things

associate

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US / ə'səʊʃɪeɪt /

UK / əˈsoʊʃiˌeɪt /

B1
  • adjecitve
  • Part of a job title indicating a junior position
  • noun
  • Partner in professional work, e.g. in law
  • verb
  • To spend time with other people; mix with
  • To form a connection in your mind between things

separate

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US / 'sepəreɪt /

UK / 'sepəreɪt /

A2
  • adjecitve
  • Being different from or unrelated to another
  • verb
  • To divide two things by being in between them
  • To live away from your husband or wife
  • To move things away from each other

appear

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US / ə'pɪə(r) /

UK / əˈpɪr /

A1
  • verb
  • To be seen, become visible; come into sight
  • To seem to be
  • To act in a play, movie, or be mentioned in media

relate

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US / rɪ'leɪt /

UK / rɪˈlet /

A2
  • verb
  • To demonstrate a logical relationship between
  • To understand or sympathize with, e.g. a problem
  • To tell a story, or tell about a particular event

scientific

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US / ˌsaɪənˈtɪfɪk /

UK / ˌsaɪənˈtɪfɪk /

A2
  • adjecitve
  • Concerning academic study of the physical world

domestic

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US / dəˈmestɪk /

UK / dəˈmɛstɪk /

A2
  • adjecitve
  • British informal fight between husband and wife
  • Concerning your own home or house
  • Concerning or made in your own country
  • noun
  • Someone paid to help with housework in your house

lose

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US / lu:z /

UK / luz /

A1
  • verb
  • To be unable to keep in check or control something
  • To decrease in value or quantity (e.g. weight)
  • To stop having certain qualities or abilities
  • To stop having or being entitled to
  • To fail to win something that is being contested
  • To be unable to find something you once had
  • To be dependent on someone (used with 'not')

sort

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US / sɔ:t /

UK / sɔrt /

A1
  • noun
  • Group or class of similar things or people
  • verb
  • To organize things by putting them into groups
  • To deal with things in an organized way

certain

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US / ˈsə:tn /

UK / ˈsɚtn /

A1
  • adjecitve
  • Definite, fixed
  • Referring to an unspecified amount or quantity
  • Being sure about something; without doubt

story

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US / 'stɔ:rɪ /

UK / ˈstɔri, ˈstori /

A1
  • noun
  • One of many floors or levels in a building
  • Account or description of how something happened

india

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US / 'ɪndɪə /

UK / ˈɪndɪə /

A1
  • proper noun
  • A country in southern Asia that occupies the greater part of the Indian subcontinent; population 1,3

equilibrium

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US / ˌi:kwɪˈlɪbriəm /

UK / ˌikwəˈlɪbriəm, ˌɛkwə- /

C2
  • noun
  • A state of balance or harmony
  • Calm, quiet, undisturbed emotional state

marble

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US / 'mɑ:bl /

UK / ˈmɑrbəl /

B1
  • noun
  • A hard type of stone, often used in monuments

fairly

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US / 'feəlɪ /

UK / ˈfɛrli /

A2
  • adverb
  • Quite; pretty; between very and a little
  • In a manner that is right and acceptable

scenario

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US / sɪˈnɑː.ri.əʊ /

UK / səˈner.i.oʊ /

B1
  • noun
  • An imagined sequence of events in a plan/project

allele

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US / əˈli:l /

UK / əˈlil /

A1
  • noun
  • Either of a pair (or series)

toss

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US / tɒs /

UK / tɔ:s /

B1
  • verb
  • To throw something into the air, e.g. casually

inherit

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US / ɪn'herɪt /

UK / ɪnˈhɛrɪt /

B1
  • verb
  • To have a quality or feature passed down at birth
  • To receive property or money after someone dies
  • To receive something that belonged to someone else

currency

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US / 'kʌrənsɪ /

UK / ˈkɚrənsi, ˈkʌr- /

B1
  • noun
  • Widespread acceptance
  • Money system that a country uses

switch

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US / swɪtʃ /

UK / swɪtʃ /

A2
  • noun
  • A change or shift from one method to another
  • Thing you move to turn electrical items on or off
  • Thin flexible piece of wood or stick
  • verb
  • To exchange or replace something for another thing

something

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US / ˈsʌmθɪŋ /

UK / ˈsʌmθɪŋ /

A1
  • adverb
  • In some degree or measure
  • noun
  • a person or thing of some value or consequence
  • pronoun
  • Thing that is not yet known or named
  • Approximately

resource

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US / riˈsɔ:s /

UK / ˈriˌsɔrs, -ˌsors, -ˌzɔrs, -ˌzors, rɪˈsɔrs, -ˈsors, /

A2
  • noun
  • Something that can be used profitably; asset
  • An essential supply of something
  • Resourcefulness; ability to deal with problems
  • verb
  • To obtain (e.g. oil, gas) from its source

spectrum

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US / 'spektrəm /

UK / ˈspɛktrəm /

B1
  • noun
  • The wavelengths of colors from red to violet
  • a range of different positions, opinions, etc. between two extreme points

suit

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US / su:t /

UK / sut /

A1
  • noun
  • Set of clothes including jacket and pants or skirt
  • Law case involving a claim of some kind
  • Set of playing cards such as hearts or diamonds
  • verb
  • To be appropriate for a given situation
  • (Of clothes) to look good on someone

environment

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US / ɪn'vaɪrənmənt /

UK / ɛnˈvaɪrənmənt, -ˈvaɪən- /

A1
  • noun
  • Natural world in which plants and animals live
  • The entire surrounding conditions of something

help

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US / help /

UK / hɛlp /

A1
  • noun
  • Something given to enable a person to do something
  • Assistance given to someone in need
  • Someone who makes something easier or possible
  • verb
  • To act to enable a person to do something; assist
  • To make something better or less difficult

version

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US / ˈvə:ʃən /

UK / ˈvɚʒən, -ʃən /

A2
  • noun
  • Different way that someone interprets something
  • New or different form of something
  • An updated form of some software

come

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US / kʌm /

UK / kʌm /

A1
  • verb
  • To arrive at a place
  • (Of mail) to be delivered
  • To move toward someone; go with someone
  • To reach a certain point or state

forever

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US / fər'evə(r) /

UK / fɔrˈɛvɚ, fə- /

B1
  • adverb
  • For all future time; in the future

detect

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US / dɪˈtekt /

UK / dɪˈtɛkt /

A2
  • verb
  • To discover or identify the presence of something

and

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US / ənd /

UK / ənd, ən,ænd /

A1
  • conjunction
  • Used to refer to two or more things
  • Plus; in addition; on top of that
  • Used to introduce an action that follows another

ingredient

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US / ɪnˈgri:diənt /

UK / ɪnˈɡridiənt /

B1
  • noun
  • Food item used when making a meal or drink
  • Quality necessary to be something to work well

affect

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US / ə'fekt /

UK / əˈfɛkt /

A2
  • verb
  • To cause a change in something else

reproduction

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US / ˌri:prəˈdʌkʃn /

UK / ˌriprəˈdʌkʃən /

B1
  • noun
  • Act or process of producing a copy of something
  • The process of making children

any

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US / 'enɪ /

UK / ˈɛni /

A1
  • adjecitve
  • One, or some, no matter which
  • pronoun
  • One (thing) of many; some

only

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US / ˈəunli /

UK / ˈonli /

A1
  • adverb
  • Just one; just that amount or thing; not more than
  • Not very important or serious
  • Just that type of thing, person
  • Short time ago; not before a certain time
  • conjunction
  • Except; but

friendly

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US / ˈfrendli /

UK / ˈfrɛndli /

A2
  • adjecitve
  • Acting like a friend; kind and helpful
  • noun
  • Game played not in a competition

tumble

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US / 'tʌmbl /

UK / ˈtʌmbəl /

B1
  • verb
  • To fall downwards, hitting the ground a few times

region

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US / 'ri:dʒən /

UK / ˈridʒən /

A2
  • noun
  • Part of a country, of the world, area, etc.

hope

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US / həʊp /

UK / hop /

A1
  • noun
  • When you wish something will happen; what you wish
  • verb
  • To expect and want something to happen

join

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US / dʒɔɪn /

UK / dʒɔɪn /

A1
  • verb
  • To bring something close to another, to become one
  • To become a member of
  • To participate in an activity with others

name

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US / neɪm /

UK / nem /

A1
  • noun
  • What something or someone is called
  • verb
  • To state what someone is called, e.g. John

entirely

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US / ɪnˈtaɪəli /

UK / ɪnˈtaɪərli /

A2
  • adverb
  • Wholly; completely

decide

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US / dɪ'saɪd /

UK / dɪˈsaɪd /

A2
  • verb
  • To make a choice or choose after thinking about it
  • To make a legal judgment in court
  • to affect the result of something

over

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US / 'əʊvə(r) /

UK / ˈovɚ /

A1
  • adverb
  • Finished; no longer happening
  • Towards the ground/away from a standing position
  • noun
  • A set of six consecutive balls bowled in cricket
  • other
  • Finished
  • preposition
  • Showing the relation when a thing is above another
  • On or covering something
  • Above or across something
  • More than you need
  • From one side to the other
  • In the direction of; toward

slash

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US / slæʃ /

UK / slæʃ /

B2
  • noun
  • Line ( / ) used in writing
  • Long, deep cut, caused by a sharp object
  • verb
  • To cut violently with a sharp object
  • To decrease something by a large amount

recipe

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US / 'resəpɪ /

UK / ˈrɛsəˌpi /

B1
  • noun
  • Conditions likely to create a particular result
  • Directions for making a dish, with the ingredients

tree

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US / tri: /

UK / tri /

A1
  • noun
  • Tall green plants in a forest

pigment

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US / 'pɪɡmənt /

UK / ˈpɪɡmənt /

B2
  • noun
  • Substance that makes things have a certain color

invite

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US / ɪnˈvaɪt /

UK / ɪnˈvaɪt /

A2
  • noun
  • An invitation
  • verb
  • To ask someone to go somewhere or do something

ton

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US / tʌn /

UK / tʌn /

A2
  • noun
  • Unit of weight; 907 kilograms (US); 1016 (UK)

another

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US / əˈnʌðə(r) /

UK / əˈnʌðɚ /

A1
  • adjecitve
  • One more, but not this
  • determiner
  • One more added
  • pronoun
  • One more (thing)

keep

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US / ki:p /

UK / kip /

A1
  • noun
  • Large, strong tower in the middle of a castle
  • Money spent on you so you can live in a place
  • verb
  • To continue doing something; not to stop
  • To stop balls going in a goal in sports
  • To not give back or return something
  • (Of food) to not spoil or not rot
  • To take possession of something to own, e.g. a pet
  • To have and continue to hold something
  • To do something that you have promised or agreed
  • To stay in a certain place or condition
  • To maintain the rules

variety

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US / və'raɪətɪ /

UK / vəˈraɪɪti /

A2
  • noun
  • Particular type of thing or person

drift

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US / drɪft /

UK / drɪft /

B1
  • verb
  • (Of sand, etc.) to be blown into heaps by the wind
  • (Of boats) to move without purpose on water
  • To move or live without a purpose or goal
  • To move slowly or effortlessly in water or air

call

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US / kɔ:l /

UK / kɔl /

A1
  • noun
  • A order or request for action
  • The sound an animal makes, often when in danger
  • A correct prediction, e.g. a decision in a game
  • A short visit to a place or person
  • A decision by a referee or umpire in a game
  • verb
  • To make a request or order for action
  • (Animal) to make sounds to warn of danger
  • To announce the date of an election
  • To make a judgment about something
  • To give someone or something a name
  • To guess in advance the result or outcome
  • To visit a place or person for a short time
  • To phone someone
  • To speak, announce or shout in a loud voice

funky

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US / fʌŋkɪ /

UK / ˈfʌŋki /

B2
  • adjecitve
  • Offbeat; fashionable

pinstripe

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US / ˈpɪnstraɪp /

UK / ˈpɪnstraɪp /

C1
  • noun
  • Cloth with thin light stripes, as in business suit

dilute

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US / daɪˈlu:t /

UK / daɪˈlut, dɪ- /

B2
  • verb
  • To make something weaker or less efficient

local

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US / ˈləʊkl /

UK / ˈloʊkl /

A2
  • adjecitve
  • Relating to a particular area, city, or town
  • noun
  • Bus or train, that stops at most stations
  • People who live in the area being discussed
  • The pub you most frequently go to

cereal

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US / 'sɪərɪəl /

UK / ˈsɪriəl /

B1
  • noun
  • Breakfast food eaten with milk
  • Grain that can be eaten

sometimes

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US / ˈsʌmtaɪmz /

UK / ˈsʌmˌtaɪmz /

A1
  • adverb
  • Only at certain times; occasionally

chair

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US / tʃeə(r) /

UK / tʃer /

A1
  • noun
  • A person in charge of an official meeting
  • A piece of furniture you sit on
  • verb
  • To be in charge of a meeting or department

from

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US / frəm /

UK / frʌm, frɑm,frəm /

A1
  • preposition
  • Starting at a particular place, time or level

dive

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US / daɪv /

UK / daɪv /

B1
  • noun
  • Restaurant, bar or club with a bad reputation
  • Rapid fall through air
  • A jump into water head-first from a high place
  • Rapid fall in the value or price of something
  • verb
  • To swim deep under water with an air supply
  • To rapid fall through air
  • To jump into water head-first
  • (Of prices) to rapidly fall

fish

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US / fɪʃ /

UK / fɪʃ /

A1
  • noun
  • Animal that swims and lives in water
  • verb
  • To go fishing with a net or hook

mortimer

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US / ˈmɔːtɪmə(r) /

UK / /

A1
  • other
  • English nobleman who deposed Edward II and was executed by Edward III

composition

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US / ˌkɒmpəˈzɪʃn /

UK / ˌkɑ:mpəˈzɪʃn /

A2
  • noun
  • Piece of writing, music etc.
  • A piece of music
  • Structure of a picture or image to make an effect

where

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US / hwɛə /

UK / hwɛr, wɛr /

A1
  • conjunction
  • At or in the place which
  • In whatever place
  • pronoun
  • Word you use to ask the location of something

owe

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US / əʊ /

UK / o /

A2
  • verb
  • To need to do something in return for a favor etc.
  • To credit someone or thing for making it possible
  • To have a commitment to pay someone for something

rare

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US / reə(r) /

UK / rɛr /

A2
  • adjecitve
  • (Of meat) cooked, but still red and juicy
  • Unusual or out of the ordinary; not common

hair

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US / heə(r) /

UK / her /

A1
  • noun
  • Long thin strands growing on your head or body
  • Short distance; a very small amount

professional

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US / prə'feʃənl /

UK / prəˈfɛʃənəl /

A2
  • adjecitve
  • Of jobs such as doctor, lawyer, accountant, etc.
  • Acting/done properly as a qualified person would
  • Getting paid for playing a sport/doing an activity
  • noun
  • Highly qualified person, e.g. lawyer or doctor
  • One who plays a sport or similar activity as a job

think

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US / θɪŋk /

UK / θɪŋk /

A1
  • verb
  • To have an idea about something without certainty
  • To have an idea, opinion or belief about something

share

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US / ʃeə(r) /

UK / ʃɛr /

A2
  • noun
  • Part-ownership in a property, business or company
  • Part of a company you own, shown by a certificate
  • verb
  • To divide something between two or more people
  • To allow others to use your things equally
  • To give information, etc. to someone

pastel

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US / ˈpæstl /

UK / pæˈstel /

B2
  • adjecitve
  • Being a pale or light color

arise

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US / əˈraɪz /

UK / əˈraɪz /

A2
  • verb
  • To stand up
  • To result or happen due to a particular event

plug

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US / plʌg /

UK / plʌɡ /

B1
  • noun
  • Wood, rubber or metal used to block a hole
  • Thing on a wire to connect to electricity supply
  • A promotion of a product
  • verb
  • To use an object to block a hole
  • To promote or advertise a product

meet

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US / mi:t /

UK / mit /

A1
  • noun
  • Sporting competition e.g. swimming
  • verb
  • To provide something that is necessary
  • To come together at a certain time or place

neighbourhood

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US / ˈneɪbəhʊd /

UK / ˈneɪbərhʊd /

B1
  • noun
  • Area of a town or city that people live in

proportion

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US / prəˈpɔ:ʃn /

UK / prəˈpɔrʃən, -ˈpor- /

A2
  • noun
  • A part of a whole thing
  • State of balance between two or more things
  • Size of one thing compared to the size of another
  • verb
  • To balance the size of something with another

trait

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US / treɪt /

UK / tret /

C2
  • noun
  • A particular characteristic that can produce a particular type of behavior

hey

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US / heɪ /

UK / he /

A1
  • exclamation
  • What you say when you want someone's attention

large

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US / lɑ:dʒ /

UK / lɑ:rdʒ /

A1
  • adjecitve
  • Big; of great size; broad, tall, wide, or fat

chocolate

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US / ˈtʃɒklət /

UK / ˈtʃɑ:klət /

A1
  • adjecitve
  • Being made from cocoa beans
  • noun
  • Hard brown candy made from cocoa beans

out

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US / aʊt /

UK / aʊt /

A1
  • adverb
  • No longer stylish (e.g. fashion)
  • Away from home, business, or the usual place
  • In a direction/movement away from inside or center
  • noun
  • Act when a batter cannot continue playing
  • verb
  • To tell people a secret

national

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US / 'næʃnəl /

UK / ˈnæʃənəl, ˈnæʃnəl /

A2
  • adjecitve
  • Concerning a nation as a whole
  • noun
  • A person of a particular country

altogether

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US / ˌɔ:ltəˈgeðə(r) /

UK / ˌɔltəˈɡɛðɚ /

A2
  • adverb
  • All things considered
  • Completely and entirely, fully
  • With all included and counted

secret

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US / 'si:krət /

UK / 'si:krət /

A1
  • adjecitve
  • That you don't want others to know; private
  • noun
  • Information you do not want others to know

two

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US / tu: /

UK / tu /

A1
  • number
  • 2

stroll

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US / strəʊl /

UK / strol /

B2
  • verb
  • To walk slowly and in a relaxed manner

back

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US / bæk /

UK / bæk /

A1
  • adjecitve
  • Farthest from the front e.g. in a classroom
  • adverb
  • Have returned to a place you were before
  • noun
  • The part of a chair that the upper body leans upon
  • Location at the rear of something
  • The reverse of side something
  • Area on the rear of your body
  • verb
  • To bet money on something
  • To go backwards in a car
  • To support and encourage someone or some cause

reproduce

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US / ˌri:prə'dju:s /

UK / ˌriprəˈdus, -ˈdjus /

B1
  • verb
  • To make a copy of something
  • To have children/young; grow roots/new plants

pattern

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US / 'pætn /

UK / ˈpætən /

A2
  • noun
  • Model to follow in making or doing something
  • Colors or shapes which are repeated on objects
  • Regular repeated behavior
  • verb
  • To copy the way something else is made

usually

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US / ˈju:ʒuəli /

UK / ˈjuːʒuəli /

A1
  • adverb
  • Normally; regularly

single

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US / 'sɪŋɡl /

UK / ˈsɪŋɡəl /

A1
  • adjecitve
  • Being one only, without others
  • Only; merely
  • Not married or in a relationship
  • noun
  • One run in cricket or a hit baseball
  • An individual song from a CD or album
  • Person who is not married or in a relationship

color

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US / 'kʌlə(r) /

UK / ˈkʌlɚ /

A1
  • noun
  • Quality of things you can see, e.g. red, blue
  • Pink or red in your face, e.g. after being ill
  • The shade of someone's skin e.g. black, or yellow
  • verb
  • To change or affect someone's opinion
  • To make something colorful using colored pencils

advantage

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US / əd'vɑ:ntɪdʒ /

UK / ædˈvæntɪdʒ /

A2
  • noun
  • Thing making the chance of success higher
  • A positive point about something

not

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US / nɒt /

UK / nɑt /

A1
  • adverb
  • Word indicating the negative
  • (Used to form the negative of verbs)

role

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US / rəʊl /

UK / rol /

A2
  • noun
  • Character played by an actor
  • Part you play in an activity; job; responsibility

effect

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US / ɪ'fekt /

UK / ɪˈfɛkt /

A1
  • noun
  • An advantage, benefit
  • Change brought about by a cause; result

famously

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US / ˈfeɪməsli /

UK / ˈfeməsli /

B1
  • adverb
  • In a manner or to an extent that is well known

tune

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US / tju:n /

UK / tun, tjun /

A2
  • noun
  • Group of musical notes that make a pleasant sound
  • verb
  • To make adjustments to equipment to make it better
  • To adjust to be at the right musical pitch
  • To modify how something operates, looks, e.g. car

tiny

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US / 'taɪnɪ /

UK / ˈtaɪni /

A2
  • adjecitve
  • Very, very small

whether

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US / ˈweðə(r) /

UK / ˈhwɛðɚ, ˈwɛð- /

A1
  • conjunction
  • If something will happen or not

duplicate

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US / ˈdju:plɪkeɪt /

UK / ˈdu:plɪkeɪt /

B2
  • noun
  • Something that is the exact same thing as another
  • verb
  • To make an exact copy of a thing

would

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US / wʊd /

UK / wʊd /

A1
  • other
  • Used to indicate something imagined
  • Used to ask or request something politely
  • Verb used to indicate possibility, request etc.
  • Used to indicate a preference
  • Used to indicate a reaction
  • Indicates something that occurred repeatedly
  • Used to indicate willingness or ability to do

yet

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US / jet /

UK / jɛt /

A1
  • adverb
  • At a later time (used after ‘not’)
  • (Used to emphasize that thing is, will be greater)
  • Eventually; at a future time
  • Until now; up to the present
  • conjunction
  • Adding to what has been said, often as a contrast

wide

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US / waɪd /

UK / waɪd /

A1
  • adjecitve
  • Having a great distance from one side to the other
  • adverb
  • Fully; completely

measure

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US / ˈmeʒə(r) /

UK / ˈmɛʒɚ /

A1
  • noun
  • Plan to achieve a desired result
  • Tool used to calculate the size of something
  • verb
  • To determine the value or importance of something
  • To calculate size, weight or temperature of

imaginary

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US / ɪ'mædʒɪnərɪ /

UK / ɪˈmædʒəˌnɛri /

A2
  • adjecitve
  • Not real; existing only in your imagination

alternate

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US / ɔ:lˈtɜ:nət /

UK / ˈɔ:ltərnət /

B2
  • verb
  • To follow one thing after another repeatedly

become

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US / bɪ'kʌm /

UK / bɪˈkʌm /

A1
  • verb
  • To begin to be; grow to be; develop into
  • To be suitable for a particular job or role

compare

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US / kəm'peə(r) /

UK / kəmˈpɛr /

A1
  • verb
  • To consider how similar and different things are

copy

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US / ˈkɒpi /

UK / ˈkɑ:pi /

A1
  • noun
  • A counter for items that are the same
  • Fake product pretending to be an original
  • An imitation of an original
  • A duplicate of a paper printed in a photocopier
  • Written text for printing, use in ads, etc.
  • verb
  • To make something look the same as the original
  • To act in the exact same way as someone else
  • To read and then write down what you read

now

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US / naʊ /

UK / naʊ /

A1
  • adverb
  • At the present time or moment
  • Right away or in the next possible moment
  • Used to refer to something that just happened
  • Time between the present and a moment in the past
  • conjunction
  • Resulting from or because of something

sum

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US / sʌm /

UK / sʌm /

A2
  • noun
  • Amount when all is added together; total
  • verb
  • To add two or more numbers together; total

really

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US / ˈri:əli /

UK / ˈriəˌli, ˈrili /

A1
  • adverb
  • Used to stress something that is said; definitely
  • In a true or accurate manner
  • Very

same

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US / seɪm /

UK / sem /

A1
  • adjecitve
  • Being equal in quality and amount
  • Identical; not different
  • Not changing; constant

protein

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US / ˈprəʊti:n /

UK / ˈprəʊˌtiːn /

B1
  • noun
  • Group of molecules made from amino acids

neutral

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US / ˈnju:trəl /

UK / ˈnu:trəl /

B1
  • adjecitve
  • Something with pH value of 7
  • Having no positive or negative electrical charge
  • Not supporting either side in a war, etc.
  • Not taking either side in a debate; not involved
  • noun
  • Color that is dull and not bright, such as gray
  • The rest position for gears in a car or vehicle
  • Person/country not supporting a side in a war, etc.

box

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US / bɒks /

UK / bɑ:ks /

A1
  • noun
  • A marked area of a baseball field
  • A container with four straight sides and a lid
  • Area of seating in a theater separated from others
  • A 4 sided container or shape printed on a page
  • Entire amount of something inside a container
  • verb
  • To strike someone on the side of the head
  • To pack an object in a six-sided container
  • To fight with gloved hands as a sport

give

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US / ɡɪv /

UK / ɡɪv /

A1
  • noun
  • Degree of flexibility in something, a material
  • verb
  • To hand over or present something to someone
  • To cause someone to have or experience something

maybe

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US / ˈmeɪbi /

UK / ˈmebi /

A1
  • adverb
  • Possibly but not certainly; perhaps

splashy

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US / ˈsplæʃi /

UK / ˈsplæʃi /

A1
  • other
  • Characterized by water flying about haphazardly
  • Covered with patches of bright color

attach

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US / ə'tætʃ /

UK / əˈtætʃ /

A2
  • verb
  • To be associated or connected with

vulnerable

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US / ˈvʌlnərəbl /

UK / ˈvʌlnərəbəl /

B1
  • adjecitve
  • Being open to attack or damage
  • Being easily harmed, hurt, or wounded

coat

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US / kəʊt /

UK / koʊt /

A2
  • noun
  • Clothing worn outside over your normal clothes
  • verb
  • To cover something thinly with something

understand

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US / ˌʌndə'stænd /

UK / ˌʌndɚˈstænd /

A1
  • verb
  • To know the meaning of language, what someone says

kitty

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US / /

UK / /

B2
  • noun
  • Amount of money a group of people share
  • Money contributed for expenses by group of people
  • Person's name

phrase

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US / freɪz /

UK / frez /

A2
  • noun
  • Common expression or saying
  • Section of musical notes in a piece of music
  • A set of words used together
  • verb
  • To choose words to say what you mean clearly

see

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US / si: /

UK / si /

A1
  • verb
  • To go on a date with someone
  • To predict whether something is, or will be true
  • To understand what someone says
  • To use your eyes to look at something
  • To visit a place often for sightseeing or pleasure
  • To visit or meet with someone
  • To find out by waiting or looking
  • To watch (a game, movie or TV show)

next

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US / nekst /

UK / nɛkst /

A1
  • adverb
  • The one that follows another in time or order
  • At a time or place directly after the present one
  • noun
  • The one that follows after
  • adjecitve
  • Immediately after the previous one
  • First occurrence after the present one

tarantula

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US / tə'ræntʃələ /

UK / təˈræntʃələ /

C2
  • noun
  • Large hairy poisonous tropical spider

film

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US / fɪlm /

UK / fɪlm /

A2
  • noun
  • Thin layer that covers something
  • Movie
  • verb
  • To record moving action with a camera

sammy

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US / ˈsæmi /

UK / ˈsæmi /

A1
  • noun
  • An American soldier fighting in the First World War (1914–18).

steady

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US / 'stedɪ /

UK / ˈstɛdi /

B2
  • adjecitve
  • Happening or developing at a regular rate
  • Continuing without stopping or changing over time
  • Firmly fixed or supported; not likely to fall over
  • noun
  • Your boyfriend or girlfriend
  • verb
  • To make constant, unchanging or staying the same
  • To hold something/someone so they stop moving

fall

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US / fɔ:l /

UK / fɔl /

A1
  • noun
  • Season after summer and before winter; Autumn
  • A drop in amount; decrease
  • Dropping from a standing position to the ground
  • verb
  • To drop in amount; to decrease
  • To come down from a higher position suddenly
  • To go from standing to the ground, by accident

almost

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US / 'ɔ:lməʊst /

UK / ˈɔlˌmost, ɔlˈmost /

A1
  • adverb
  • Only a little less than, nearly, not quite

location

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US / ləʊˈkeɪʃn /

UK / loʊˈkeɪʃn /

B1
  • noun
  • Particular position or area of place, event, etc.

century

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US / 'sentʃərɪ /

UK / ˈsɛntʃəri /

A1
  • noun
  • Period of 100 years

hand

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US / hænd /

UK / hænd /

A1
  • noun
  • Cards given to a player in a card game
  • Piece of a clock that points to the time
  • Someone who performs physical tasks or work
  • Body part at the end of a person's arm
  • Help for someone performing a particular action
  • Condition of having power or influence
  • Member of the crew of a ship
  • verb
  • To give something to someone personally

information

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US / ˌɪnfəˈmeɪʃn /

UK / ˌɪnfɚˈmeʃən /

A1
  • noun
  • Collection of facts and details about something

blow

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US / bləʊ /

UK / blo /

A2
  • noun
  • Something that causes you difficulty or sadness
  • Act of making air come out of your mouth
  • A hit or strike from an object
  • verb
  • To move something using air
  • To make air come quickly out of your mouth
  • To clear something by forcing air through it

mark

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US / mɑ:k /

UK / mɑrk /

A2
  • noun
  • Person's name
  • A dirty spot or line on something
  • Grade or score given for homework
  • Line or symbol made when writing
  • Particular point on a scale of measurement
  • Grade, such as a student receives in school
  • Stain or spot on something
  • Sign or symbol of a quality of feeling
  • Written sign or symbol
  • verb
  • To put a dirty spot or line on something
  • To give a grade for homework
  • To indicate something with a sign or symbol
  • To make or leave a visible sign of (path, etc.)
  • (Animals) to go to the toilet to show your area
  • To write or draw a line on something

entomologist

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US / ˌentə'mɒlədʒɪst /

UK / ˌentə'mɒlədʒɪst /

C2
  • noun
  • Zoologist who studies insects

spike

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US / spaɪk /

UK / spaɪk /

B2
  • noun
  • The top point in a graph
  • Long, thin metal rod that ends in a point
  • verb
  • To go up to a point on a graph

loss

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US / lɒs /

UK / lɔ:s /

A2
  • noun
  • Friend, family, or other loved person's death
  • Decrease or decline in quantity or amount
  • Experience or state of failing to have or keep
  • A situation when you lose a game
  • Process of failing to have or keep something
  • Difficulty or trouble caused by someone's leaving
  • Situation when more money is spent than is earned

with

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US / wɪð /

UK / wɪð, wɪθ /

A1
  • preposition
  • As an employee of a certain company
  • Against something or someone
  • By using something as a means
  • Due to; because of
  • Including
  • Possessing as a feature
  • Related to
  • (Of the manner/attitude by which you do something)
  • Used to express that people or things are together

comprise

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US / kəm'praɪz /

UK / kəmˈpraɪz /

B1
  • verb
  • To be made up of (different parts)

dark

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US / dɑ:k /

UK / dɑrk /

A1
  • adjecitve
  • Of a color that is not light
  • Marked by unhappiness or hopelessness
  • Having little or no light; not light in color
  • noun
  • The time of day when the sky is black

increase

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US / ɪn'kri:s /

UK / ɪnˈkris /

A1
  • noun
  • Fact of increasing; amount something grows by
  • verb
  • To make or become larger in size or amount

process

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US / prə'ses /

UK / ˈprɑsˌɛs, ˈproˌsɛs /

A2
  • noun
  • Dealing with official forms in the way required
  • Set of changes that occur slowly and naturally
  • verb
  • To organize and use data in a computer
  • To deal with official forms in the way required
  • To prepare by treating something in a certain way
  • To adopt a set of actions that produce a result
  • To convert by putting something through a machine

collaboration

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US / kəˌlæbəˈreɪʃn /

UK / kəˌlæbəˈreɪʃn /

B1
  • noun
  • Act of working with someone to complete a task

without

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US / wɪˈðaʊt /

UK / wɪðˈaʊt, wɪθ- /

A1
  • preposition
  • Not with; not having

know

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US / nəʊ /

UK / noʊ /

A1
  • verb
  • To be familiar with a person or place, thing
  • To feel sure or be convinced about something
  • To discover or be aware of something
  • To be able to distinguish
  • To have knowledge of things

have

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US / həv /

UK / hæv /

A1
  • verb
  • To drink, smoke, eat or use something
  • To experience the effects of something
  • To organize an event, or join in an activity
  • To own, possess, or hold something
  • To cause to happen or produce a particular effect

dip

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US / dɪp /

UK / dɪp /

B1
  • noun
  • Food or sauce eaten with crackers/raw vegetables
  • Place on surface (e.g. a road) lower than the rest
  • verb
  • To decrease or lower temporarily
  • To put something in and out of a liquid quickly
  • To switch off or lower lights on a car

educator

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US / ˈedʒukeɪtə(r) /

UK / ˈɛdʒəˌketɚ /

A2
  • noun
  • Someone who teaches

unit

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US / ˈju:nɪt /

UK / ˈjunɪt /

B2
  • noun
  • One apartment in a building
  • Group of people, e.g. soldiers, that work together
  • A chapter of a textbook
  • A standard of measurement of something
  • Single item made by a company

model

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US / ˈmɒdl /

UK / ˈmɑ:dl /

A2
  • adjecitve
  • Being an excellent example of
  • noun
  • Person who wears fashion to show it to the public
  • A small scale copy of a full original
  • verb
  • To wear and display clothes at a fashion show
  • To make a small scale copy of a full original

behind

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US / bɪˈhaɪnd /

UK / bɪˈhaɪnd /

A1
  • adjecitve
  • Concerning a later or slower time than expected
  • Being in a losing position in a sporting event
  • Being in the past; old fashioned
  • adverb
  • Remaining
  • noun
  • The part of the body that one sits on
  • preposition
  • At or toward the back of someone or something
  • Supporting or helping someone

encode

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US / ɪn'kəʊd /

UK / ɛnˈkod /

B2
  • verb
  • To change a message or information into code

community

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US / kə'mju:nətɪ /

UK / kəˈmjunɪti /

A2
  • noun
  • Group of people who share a common idea or area

cinnamon

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US / ˈsɪnəmən /

UK / ˈsɪnəmən /

B2
  • noun
  • Sweet spice used in cooking or desserts

tug

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US / tʌg /

UK / tʌɡ /

B1
  • noun
  • Pull at something that is hard or sudden
  • verb
  • To pull (something) hard or suddenly

count

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US / kaʊnt /

UK / kaʊnt /

A2
  • noun
  • Number of things added together, e.g. votes
  • With the number of crimes, knockouts, as stated
  • verb
  • To add things together to find the total number
  • To matter or be important
  • To include someone or something in a final number

before

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US / bɪˈfɔ:(r) /

UK / bɪˈfɔr,-ˈfor /

A1
  • adverb
  • At a time earlier than the present; previously
  • conjunction
  • In advance of something happening
  • preposition
  • In front of someone or something

cream

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US / kri:m /

UK / krim /

B1
  • adjecitve
  • Pale color that is yellowish white
  • noun
  • Type of a thick beauty product used on the skin
  • Thick liquid rubbed into the skin
  • The top part of milk when left standing
  • verb
  • To defeat someone with ease
  • To have added cream
  • To mix together into a thick substance or liquid

cover

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US / 'kʌvə(r) /

UK / ˈkʌvɚ /

A1
  • noun
  • A different version of another song
  • Bed sheets; blankets
  • (Police or military) protection from attack
  • Amount of money to be paid in an insurance claim
  • Thing you put over something to close or hide it
  • Front and back part of a book or magazine
  • Shelter built to protect from the natural elements
  • verb
  • To record a different version of another song
  • To include as part of its area
  • To put something over something to hide it
  • To discuss a subject in a talk or meeting
  • To form a layer over something so it is hidden
  • To have sufficient funds to pay for something
  • To include something within an agreed limit
  • To report news on TV, radio or in a newspaper
  • (Police or military) to protect from attack
  • To travel a certain distance in a given time
  • To wrap something with something, such as a cloth

founder

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US / ˈfaʊndə(r) /

UK / ˈfaʊndɚ /

B1
  • noun
  • Person establishing an organization, school etc.
  • verb
  • (Of business, idea, etc.) to fail
  • (Of a ship) To be sinking after hitting rocks

mating

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US / ˈmeɪtɪŋ /

UK / ˈmeɪtɪŋ /

B1
  • verb
  • To pair a male and female so they have children
  • To join or fit two things together

estimate

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US / 'estɪmət /

UK / ˈɛstəˌmet /

A2
  • noun
  • Guess or calculation of cost, size or value
  • verb
  • To guess or calculate the cost, size or value of

artificial

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US / ˌɑ:tɪ'fɪʃl /

UK / ˌɑrtəˈfɪʃəl /

B1
  • adjecitve
  • Dishonest, to seem fake, not sincere
  • (Something) made by people; not created by nature

dictate

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US / dɪk'teɪt /

UK / ˈdɪkˌtet /

B1
  • verb
  • To speak while someone writes down your words
  • To make a thing necessary
  • To order that something should happen

collapse

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US / kə'læps /

UK / kəˈlæps /

B1
  • verb
  • To fold (e.g. a stroller) down to make it smaller
  • To suddenly fall down or break apart into pieces
  • To fall down suddenly due to being ill or tired

appearance

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US / əˈpɪərəns /

UK / əˈpɪrəns /

A2
  • noun
  • The way a person looks to others
  • The way that something looks

onto

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US / ˈɒntə /

UK / ˈɑnˌtu, -tə, ˈɔn- /

A1
  • preposition
  • Towards a certain direction/into a certain area

group

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US / ɡru:p /

UK / ɡrup /

A1
  • noun
  • Two or more musicians who play music together
  • Number of people or things gathered together
  • verb
  • To combine or collect objects or people together

protect

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US / prə'tekt /

UK / prəˈtɛkt /

A1
  • verb
  • To defend someone or something from harm or danger

hear

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US / hɪə(r) /

UK / hɪr /

A1
  • verb
  • To be aware of sound; to perceive with the ear
  • To be told or find out information or facts
  • To consider or listen to a court case

bear

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US / bɛː /

UK / bɛr /

A2
  • noun
  • Large brown animal with fur that lives in forests
  • Someone who expects stock market to fall
  • verb
  • To accept (responsibilities or duties)
  • To give birth to a child; to produce fruit
  • To accept or suffer the weight of difficulties
  • To keep moving left or right while going forward
  • To show (sign of something)
  • To support the weight of something, e.g. a bridge

serve

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US / sɜ:v /

UK / sɚv /

A2
  • verb
  • To act in a particular position or office
  • To hit the first ball to an opponent in tennis etc.
  • To be used for a particular purpose
  • To give someone food or drinks
  • To give a person or group a service that is needed
  • To spend a particular amount of time in prison
  • To help customers find products and making sales
  • To give an official paper to appear in court

popularity

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US / ˌpɒpjuˈlærəti /

UK / ˌpɑ:pjuˈlærəti /

A2
  • noun
  • State of being liked or supported by many people

scientist

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US / ˈsaɪəntɪst /

UK / ˈsaɪəntɪst /

A2
  • noun
  • Person who is trained in a science

least

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US / li:st /

UK / list /

A1
  • adverb
  • In the smallest or lowest way
  • noun
  • Something that is of the lowest or smallest degree

piebald

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US / ˈpaɪbɔːld /

UK / ˈpaɪbɔːld /

A1
  • adjecitve
  • Having sections or patches colored differently and usually brightly

down

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US / daʊn /

UK / daʊn /

A1
  • adjecitve
  • Being sad, sick, or unhappy
  • Not operating, working, or functioning as expected
  • adverb
  • In a sitting or lying position
  • Towards or on the ground, floor, or bottom
  • Written or copied onto a piece of paper or book
  • noun
  • A period of play in American Football
  • The soft, smooth hairs that cover a bird's body
  • preposition
  • Along something's path, course, or direction
  • Going from a higher position to a lower position
  • verb
  • To eat or drink very quickly and without stopping

then

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US / ðen /

UK / ðɛn /

A1
  • adverb
  • A time that is not now
  • Following another thing in time or arrangement
  • Following on reasonably from what was just stated
  • At that time, not now

biologist

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US / baɪˈɒlədʒɪst /

UK / baɪˈɑːlədʒɪst /

A2
  • noun
  • A scientist who studies living things

variation

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US / ˌveəriˈeɪʃn /

UK / ˌvɛriˈeʃən, ˈvær- /

A2
  • noun
  • Something almost the same as another but different
  • Music played with a different tune from another

tally

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US / 'tælɪ /

UK / ˈtæli /

B2
  • noun
  • A score or amount
  • verb
  • To count or reckon up; to score a point

blonde

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US / blɒnd /

UK / blɑ:nd /

A2
  • adjecitve
  • Having hair of pale yellow color; of such hair
  • noun
  • Person with pale yellow hair color

right

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US / raɪt /

UK / raɪt /

A1
  • adjecitve
  • Correct or true
  • The south side of you looking at the rising sun
  • adverb
  • Exactly in a place or time
  • Being appropriate for a particular event
  • In a straight or direct manner
  • noun
  • Something you are legally or morally allowed to do
  • Ideal of what is just and good
  • Political view based on conservatism
  • verb
  • To fix something previously wrong or unjust
  • To make upright, as a boat that has turned over

people

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US / 'pi:pl /

UK / ˈpipəl /

A1
  • noun
  • Persons sharing culture, country, background, etc.
  • Men, Women, Children

hard

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US / hɑ:d /

UK / hɑː(r)d /

A1
  • adjecitve
  • Difficult to do; difficult to understand
  • (Of facts) not able to be misunderstood; clear
  • (Of alcohol) strong
  • Involving or requiring lots of work, effort, care
  • Being full of pain, trouble, and problems
  • Strong
  • (Of edge) clear; sharp
  • Difficult to bend, break or cut; solid
  • adverb
  • With lots of force, power, or impact

dash

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US / dæʃ /

UK / dæʃ /

B1
  • noun
  • Hyphen e.g. '-'; or space
  • Act of running quickly towards a particular place
  • Small amount of something (often used in cooking)
  • verb
  • To hit against something with a lot of force
  • To destroy or damage a feeling, such as hope
  • To run or move very quickly or hastily

even

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US / 'i:vn /

UK / ˈivən /

A1
  • adjecitve
  • Being equal in influence, power, possibility etc.
  • Being divided equally or fairly
  • (Of teams/contest) with similar chances of success
  • Smooth, level, or regular
  • Can be divided by 2; ending in 2, 4, 6, 8, or 0
  • At a regular, equally steady manner
  • Remaining steady and unchanging
  • adverb
  • (When this is surprising) as well; too
  • (Used to compare two things/stress the difference)
  • verb
  • To make something level; to flatten
  • To make something equal

misconception

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US / ˌmɪskənˈsepʃn /

UK / ˌmɪskənˈsɛpʃən /

B1
  • noun
  • Wrong or misunderstood idea

similar

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US / ˈsɪmələ(r) /

UK / ˈsɪməlɚ /

A1
  • adjecitve
  • Nearly the same; alike

eye

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US / aɪ /

UK / aɪ /

A1
  • noun
  • The part of the body that you see with
  • The skill to see the good and bad parts of a thing
  • Hole at the end of a needle
  • verb
  • To watch or study something closely

example

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US / ɪgˈzɑ:mpl /

UK / ɪɡˈzæmpəl /

A1
  • noun
  • Thing, person which represents a category

mainstream

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US / ˈmeɪnstri:m /

UK / ˈmenˌstrim /

C2
  • adjecitve
  • considered normal, and having or using ideas, beliefs, etc. that are accepted by most people
  • noun
  • Prevailing current of thought

bacteria

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US / bæk'tɪərɪə /

UK / bækˈtɪriə /

B2
  • noun
  • The very small creatures that can cause disease

first

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US / fɜ:st /

UK / fɚst /

A1
  • adjecitve
  • 1st; Coming before all others in time or place
  • noun
  • Something that has not happened before
  • Position of the winner of a competition

despite

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US / dɪˈspaɪt /

UK / dɪˈspaɪt /

A2
  • preposition
  • Without being affected by something; in spite of

fire

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US / 'faɪə(r) /

UK / faɪr /

A1
  • noun
  • Heat and the flame produced when burning
  • Intense energy for or about something
  • verb
  • To apply heat to something to make it hard
  • To make a person leave their job; dismiss
  • To shoot a gun or weapon
  • To launch something into the sky, e.g. a rocket
  • To start working on something e.g. a project

that

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US / ðæt /

UK / ðæt, ðət /

A1
  • adjecitve
  • The person or thing being talked about
  • Used to identify something both the speakers know
  • adverb
  • Used to reinforce adjectives and adverbs
  • To such a degree
  • conjunction
  • Used to connect a noun clause
  • Used to introduce an adverbial clause
  • Used to introduce a noun clause
  • determiner
  • Used as a noun to refer to something
  • pronoun
  • Referring an object far away
  • Used to refer to the relative pronoun ‘which’

endanger

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US / ɪn'deɪndʒə(r) /

UK / ɛnˈdendʒɚ /

B1
  • verb
  • To bring a person/thing into a dangerous situation

mean

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US / mi:n /

UK / min /

A1
  • adjecitve
  • Being good at
  • Nasty; unkind
  • Not liking to spend money; cheap; stingy
  • noun
  • Average of a set of numbers
  • verb
  • To express a particular idea or thought
  • To intend to do something in particular
  • To have a particular meaning or value

diversity

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US / daɪ'vɜ:sətɪ /

UK / dɪˈvə:sɪti, daɪ- /

B1
  • noun
  • Having a range of different races, ideas etc.

pool

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US / pu:l /

UK / pul /

A2
  • noun
  • Amount collected, e.g. money, for some purpose
  • Small body of still water
  • Game of hitting balls on a table with long sticks
  • Small area of water for swimming bound by walls
  • verb
  • (Of a liquid) to collect into a small area
  • To make a collection of (resources, money etc.)

number

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US / ˈnʌmbə(r) /

UK / ˈnʌmbɚ /

A1
  • noun
  • Symbols such as 1, 2, 56, 793
  • Particular song or dance performed during a show
  • Total quantity or amount of things
  • verb
  • To put numbers on things
  • To assign a sequence within a group, series, set
  • To claim to be part of a larger group, series, set

cause

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US / kɔ:z /

UK / kɔz /

A2
  • noun
  • Belief, goal or organization that people support
  • Reason for
  • verb
  • To make something happen; create effect or result

toilet

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US / ˈtɔɪlət /

UK / 'tɔɪlət /

A2
  • noun
  • Room where you go to urinate or excrete; bathroom
  • verb
  • To wash and take care of your body

about

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US / ə'baʊt /

UK / əˈbaʊt /

A1
  • adverb
  • To be ready to; going to
  • Nearly; approximately; roughly
  • Near; next to; close to
  • In every direction; in the area of
  • preposition
  • Concerning or of (a topic)

dna

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US / ˌdiː en ˈeɪ /

UK / ˌdiː en ˈeɪ /

B2
  • noun
  • Chemical in living cells with genetic information

stay

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US / steɪ /

UK / ste /

A1
  • noun
  • Legal order to stop or delay an action
  • Strong rope or wire that supports a ship's mast
  • Period of time spent living in or visiting a place
  • verb
  • To keep trying without giving up
  • To remain in the same place and not move away
  • To spend time visiting a place or someone's home

different

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US / ˈdɪfrənt /

UK / ˈdɪfrənt /

A1
  • adjecitve
  • Not of the same kind; unlike other things

each

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US / i:tʃ /

UK / itʃ /

A1
  • determiner
  • Every one of two or more things
  • pronoun
  • Per one person or thing

yeah

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US / jeə /

UK / ˈjɛə, ˈjæə, jɛ- /

A1
  • exclamation
  • Another way of saying 'yes'

boat

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US / bəʊt /

UK / bot /

A1
  • noun
  • Small form of transport for traveling on water
  • verb
  • To travel on a lake or river

get

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US / ɡet /

UK / ɡɛt /

A1
  • verb
  • To become affected by illness or disease
  • To begin to feel or understand an emotion or idea
  • To send or bring someone or something home, etc.
  • To go somewhere to obtain something
  • To (cause to) do a particular thing
  • To obtain, receive or be given something
  • To currently have
  • To prepare for use
  • To understand something being said or read

what

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US / wɒt /

UK / hwɑt, hwʌt, wɔt, wʌt,hwət, wət /

A1
  • pronoun
  • Thing or things that; the same kind as
  • Used to emphasize something you are about to say
  • adjecitve
  • Used to refer to a particular amount, or number
  • Used to place emphasis on a particular quality
  • adverb
  • To a certain degree
  • determiner
  • Question words used for asking for information
  • exclamation
  • Used to express excitement, shock, or surprise
  • Used to ask people to repeat something they said

total

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US / ˈtəʊtl /

UK / ˈtoʊtl /

A1
  • adjecitve
  • Complete
  • noun
  • Whole number or amount of something
  • verb
  • To damage a car beyond repair

force

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US / fɔ:s /

UK / fɔrs, fors /

A1
  • noun
  • Group of persons trained for military action; army
  • Pressure; attraction
  • The use of physical strength/violence to persuade
  • verb
  • To use physical strength or violence to persuade

mix

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US / mɪks /

UK / mɪks /

A2
  • noun
  • A combination of more than two things
  • verb
  • To combine two or more things to make one
  • To meet and get along with others, e.g. at a party

like

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US / laɪk /

UK / laɪk /

A1
  • adjecitve
  • Being equal in status or kind to something else
  • Similar; the same
  • adverb
  • For example
  • preposition
  • Used as a filler; used to ad emphasis
  • In a way similar to the way something is done
  • Such as; for example
  • verb
  • To want to
  • To find something pleasing; to prefer something

find

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US / faɪnd /

UK / faɪnd /

A1
  • noun
  • Object discovered by chance
  • Things that have been discovered from searching
  • verb
  • To become aware of something that is happening
  • To discover or meet by chance
  • To decide if someone is guilty of a crime, or not
  • To learn through study, research, or effort
  • To discover something by looking for it

happen

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US / 'hæpən /

UK / ˈhæpən /

A1
  • verb
  • To take place or occur

perspective

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US / pə'spektɪv /

UK / pɚˈspɛktɪv /

B1
  • noun
  • Artistic method of creating a sense of distance
  • Ability to understand what is important in life

suddenly

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US / ˈsʌdənli /

UK / ˈsʌdn:lɪ /

A1
  • adverb
  • In an unexpected or very quick manner

watch

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US / wɒtʃ /

UK / wɑtʃ /

A1
  • noun
  • Period of time someone is responsible for guarding
  • Device you wear on your wrist that shows the time
  • Official warning statement, e.g. of bad weather
  • verb
  • To keep in check, manage, or control something
  • To look at something for entertainment, e.g. TV
  • To guard a place or people; protect child, etc.
  • To look at carefully to work out what is happening
  • To protect and care for someone or something

humor

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US / 'hju:mə /

UK / ˈhjumɚ /

B1
  • noun
  • Quality that makes something funny
  • Mood that a person is in
  • other
  • To pretend to agree with so they don't get upset
  • verb
  • To pretend to agree with so they don't get upset
  • To agree with someone but don't really mean it

nothing

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US / 'nʌθɪŋ /

UK / ˈnʌθɪŋ /

A1
  • noun
  • Item of little or no value, importance, interest
  • Number or value of zero
  • pronoun
  • Not anything, not a single thing

include

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US / ɪnˈklu:d /

UK / ɪnˈklud /

A1
  • verb
  • To make someone, something part of a group

select

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US / sɪ'lekt /

UK / sɪˈlɛkt /

A2
  • verb
  • To choose a suitable thing from a group

specie

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US / 'spi:ʃi: /

UK / 'spi:ʃɪ /

B1
  • noun
  • Singular of species

chartreuse

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US / ʃɑ:ˈtrɜ:z /

UK / ʃɑ:rˈtru:z /

C2
  • noun
  • Aromatic green or yellow liqueur

take

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US / teɪk /

UK / tek /

A1
  • noun
  • Filming of a single scene for TV or the movies
  • verb
  • To accept something that is offered
  • To use a method of traveling, e.g. a bus or train
  • To use a camera to make (a photo)
  • To pick up something and go away with it
  • To study a subject in school
  • To attempt to pass (an exam)
  • To require a certain amount of time, money, space

its

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US / ɪts /

UK / ɪts /

A1
  • adjecitve
  • Referring to or belonging to ‘it’
  • determiner
  • Of something; belonging or related to something
  • other
  • Possessive form of “it”

scenery

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US / 'si:nərɪ /

UK / ˈsinəri /

A2
  • noun
  • Stage props during a play; a country view
  • Natural views of an area

everyone

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US / ˈevriwʌn /

UK / ˈɛvriˌwʌn /

A1
  • pronoun
  • Every person; everybody

reflect

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US / rɪ'flekt /

UK / rɪˈflɛkt /

A2
  • verb
  • To indicate or be a sign of something
  • To bounce back light, heat, sound from a surface
  • To show an image in glass, water, a mirror etc.
  • To think of something seriously and carefully

they

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US / ðeɪ /

UK / ðe /

A1
  • pronoun
  • Two or more people, animals, or things

result

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US / rɪ'zʌlt /

UK / rɪˈzʌlt /

A2
  • noun
  • Something produced through tests or experiments
  • Final score of a competition, election or game
  • verb
  • To be the outcome of other causes and effects

remove

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US / rɪˈmu:v /

UK / rɪˈmuv /

A1
  • verb
  • To get rid of something completely
  • To make someone leave his or her job or position
  • To move, erase or take away from a place
  • To take something off (e.g. clothing)

nature

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US / 'neɪtʃə(r) /

UK / ˈnetʃɚ /

A1
  • noun
  • Person's character or particular way of behaving
  • Basic look, feel or function of something
  • Physical world, including plants, animals, rocks

breed

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US / bri:d /

UK / brid /

A2
  • noun
  • Kind of / sort of
  • Particular kind of animal, e.g. a Labrador dog
  • verb
  • To create situations for a (bad) thing to happen
  • To produce baby animals of specific kinds
  • To have (children); bring up or raise children

risk

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US / rɪsk /

UK / rɪsk /

A1
  • noun
  • Actions that cause potential problems
  • verb
  • To do something potentially dangerous or foolish

tie

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US / taɪ /

UK / taɪ /

A2
  • noun
  • Item, such as string or wire, used to join things
  • Strong connection between people, countries
  • When both sides in a game, vote get same score
  • One match or game that is part of a bigger contest
  • Something that lessens a person's freedom
  • Thin piece of cloth worn round neck of shirt
  • Piece of wood/metal used to stop something moving
  • verb
  • To attach things (together) with a string or rope
  • To end a game, contest or vote with the same score
  • To require someone to be in a specific place

background

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US / ˈbækgraʊnd /

UK / ˈbækˌɡraʊnd /

A2
  • noun
  • Images, color, or information behind the main one
  • Someone's personal work and educational history
  • A position not as important as the main event
  • Past events that influence things in the present

nice

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US / naɪs /

UK / naɪs /

A1
  • adjecitve
  • Being attractive or of high quality or value
  • Good or enjoyable
  • Being kind or friendly

feature

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US / 'fi:tʃə(r) /

UK / ˈfitʃɚ /

A2
  • adjecitve
  • Main; important
  • noun
  • Special report in a magazine or paper
  • Distinctive or important point of something
  • verb
  • To highlight or give special importance to

isolate

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US / ˈaɪsəleɪt /

UK / ˈaɪsəˌlet /

B1
  • verb
  • To identify, consider, or deal with separately
  • To keep in a place or situation apart from others
  • To separate something from another substance

gain

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US / ɡeɪn /

UK / ɡen /

A2
  • noun
  • An increase in something, such as weight
  • verb
  • To increase in something, such as weight
  • To get something wanted, needed or valued

red

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US / red /

UK / rɛd /

A1
  • adjecitve
  • Being the color of blood

cheetah

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US / ˈtʃi:tə /

UK / ˈtʃitə /

B2
  • noun
  • Fast large spotted cat found in Africa and Asia

movement

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US / ˈmu:vmənt /

UK / ˈmuvmənt /

A2
  • noun
  • Part of a piece of classical music
  • Group with a shared interest or goal
  • Group sharing the same idea to change society, art
  • Action you do when exercising, e.g. in a gym
  • Part of a piece of music

eyebrow

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US / ˈaɪbraʊ /

UK / ˈaɪˌbraʊ /

B1
  • noun
  • Line of hair that grows above the eye

due

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US / dju: /

UK / du, dju /

A1
  • adjecitve
  • When something is required or expected
  • Owed to a person as a right
  • noun
  • Something you deserve; something you can expect

their

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US / ðɛː /

UK / ðer /

A1
  • determiner
  • Belonging to them

capsize

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US / kæp'saɪz /

UK / ˈkæpˌsaɪz, kæpˈsaɪz /

C1
  • verb
  • (Of boats) to overturn accidentally

pretty

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US / 'prɪtɪ /

UK / ˈprɪti /

A1
  • adjecitve
  • Being attractive to the eye in a simple way
  • adverb
  • Very; to a great degree

elephant

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US / ˈelɪfənt /

UK / ˈɛləfənt /

A2
  • noun
  • Large gray animal with a long nose and two tusks

british

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US / ˈbrɪtɪʃ /

UK / ˈbrɪtɪʃ /

A1
  • adjecitve
  • Concerning the culture and people of British

bring

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US / brɪŋ /

UK / brɪŋ /

A1
  • verb
  • To take or go with someone to a place

drastic

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US / ˈdræstɪk /

UK / ˈdræstɪk /

B2
  • adjecitve
  • Serious, severe or extreme

produce

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US / prə'dju:s /

UK / prəˈdus, -ˈdjus, pro- /

A1
  • noun
  • Fresh foods such as fruits and vegetables
  • verb
  • To grow something naturally
  • To make something appear
  • To manufacture something using machines
  • To control the making a movie or television show

hold

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US / həʊld /

UK / hold /

A1
  • noun
  • Section of a ship or plane used for storing things
  • Influence or power held over someone
  • Place of support for hands or feet when climbing
  • verb
  • To agree to keep something for someone
  • To have the capacity to support/contain something
  • To control an area and protect it from attack
  • To not allow someone to leave a place
  • To cause an event to happen at a place or time
  • To use hands or arms to carry or keep something
  • To have a specific quality or property
  • To keep an image, belief or feeling in your mind
  • To have or own something
  • To wait before being able to talk on the phone
  • To limit the movement of someone in a sport

useful

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US / ˈju:sfl /

UK / ˈjusfəl /

A1
  • adjecitve
  • That can help with a particular task

close

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US / kləʊz /

UK / kloʊz /

A1
  • adjecitve
  • Almost; near
  • (Of a friend) well-known; liked by others
  • Being near or related
  • Similar; nearly the same
  • verb
  • To come progressively nearer to something
  • To end; to bring to an end
  • To make something shut; stop from being open

topic

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US / 'tɒpɪk /

UK / ˈtɑpɪk /

A2
  • noun
  • Subject or issue people talk or write about

microevolution

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US / ˌmaɪkrəʊevəˈluːʃən /

UK / ˌmaɪkroˌevəˈlʊʃən; ˌmaɪkroˌivəˈlʊʃən /

A1
  • other
  • Evolution resulting from small specific genetic changes that can lead to a new subspecies

original

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US / ə'rɪdʒənl /

UK / əˈrɪdʒənəl /

A2
  • adjecitve
  • Being first made, thought or performed; fresh
  • Being unique or thinking differently from others

between

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US / bɪˈtwi:n /

UK / bɪˈtwin /

A1
  • preposition
  • From one person, thing, or place, to another
  • In the space that separates two objects
  • Among two or more people who share something

move

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US / mu:v /

UK / muv /

A1
  • noun
  • Act of moving a playing piece in chess, etc.
  • An action; doing something
  • Step taken to achieve a goal
  • verb
  • To cause someone to have certain emotions
  • To cause something to change to a different place
  • To change where people live or a business operates
  • To take action to do or achieve something

harmful

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US / ˈhɑ:mfl /

UK / ˈhɑ:rmfl /

A2
  • adjecitve
  • Likely to cause damage or injury

hum

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US / hʌm /

UK / hʌm /

B2
  • noun
  • A constant low sound
  • verb
  • To make a constant low sound
  • To move very fast
  • To sing a tune without opening the mouth

spot

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US / spɒt /

UK / spɑt /

A2
  • noun
  • A certain place or area
  • A difficult time; awkward situation
  • Place or ranking on a list
  • A small amount of (substance help hard work etc.)
  • Mark caused by a drop of liquid, food, etc.
  • verb
  • To see someone or something by chance

way

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US / weɪ /

UK / we /

A1
  • adverb
  • Used to emphasize the amount of something
  • noun
  • Particular aspect of something being thought about
  • One of various choices that could be made
  • Particular existing condition or state
  • (Often long) distance or length of time
  • How something is done
  • Route to go to a place
  • Small street
  • Usual behavior, emotions or habits of someone

outcome

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US / ˈaʊtkʌm /

UK / ˈaʊtˌkʌm /

A2
  • noun
  • Something that happens as a result, consequence

link

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US / lɪŋk /

UK / lɪŋk /

A2
  • noun
  • Any one of the rings that are part of a chain
  • Connection between two or more things or people
  • Webpage item you click to go to another webpage
  • verb
  • To join or connect together

else

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US / els /

UK / ɛls /

A1
  • adverb
  • Otherwise; if you fail to
  • (Of person place thing etc.) besides; in addition

change

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US / tʃeɪndʒ /

UK / tʃendʒ /

A1
  • noun
  • Exchange of one set of clothes for another
  • Money in the form of coins instead of paper
  • Money returned after giving too much
  • Act of making or becoming something else
  • verb
  • To exchange one set of clothes for another
  • To exchange one kind of money for another
  • To replace something with another thing
  • To make or become something else
  • To go from one train, bus, etc. and go to another

ancestor

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US / 'ænsestə(r) /

UK / ˈænˌsɛstɚ /

B1
  • noun
  • A person from your family that lived in the past

biology

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US / baɪˈɒlədʒi /

UK / baɪˈɑlədʒi /

A2
  • noun
  • The study of living things

all

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US / ɔ:l /

UK / ɔl /

A1
  • adverb
  • Completely; totally
  • determiner
  • Being every one of something
  • pronoun
  • 100% of something; the complete amount

regardless

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US / rɪˈgɑ:dləs /

UK / rɪˈɡɑrdlɪs /

A2
  • adverb
  • Without being affected or concerned by something

lived

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US / 'lɪvd /

UK / 'lɪvd /

A1
  • verb
  • To be alive
  • To experience a particular type of life
  • To make your home in a house or town

chance

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US / tʃɑ:ns /

UK / tʃæns /

A1
  • adjecitve
  • Happening by luck; not planned
  • Taking a risk to try something
  • noun
  • The way something happens without planning
  • An opportunity; favorable circumstances, situation
  • The possibility that something will happen
  • verb
  • To occur just through luck; happen
  • To take a risk to try something

thank

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US / θæŋk /

UK / θæŋk /

A1
  • verb
  • To tell someone you are grateful to them

look

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US / lʊk /

UK / lʊk /

A1
  • noun
  • Person's beauty or physical attractiveness
  • Particular style of dress, clothes, or appearance
  • The way someone, something appears to be
  • Act of searching for or examining something
  • verb
  • To appear to be; seem

bright

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US / braɪt /

UK / braɪt /

A2
  • adjecitve
  • Cheerful and happy (manner)
  • (Of color) light and easy to see; vivid
  • Producing a lot of light
  • Smart; intelligent; clever

common

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US / 'kɒmən /

UK / ˈkɑmən /

A1
  • adjecitve
  • Shared; Belonging to or used by everyone
  • Typical, normal; not unusual
  • noun
  • Area in a city or town that is open to everyone
  • Field near a village owned by the local community

introduce

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US / ˌɪntrəˈdju:s /

UK / ˌɪntrəˈdus, -ˈdjus /

A1
  • verb
  • To open an essay to set the scene
  • To guide or explain something, e.g. a town
  • To begin the use of a new thing or practice
  • To make someone known to another by name
  • To insert or put something inside another thing

human

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US / 'hju:mən /

UK / ˈhjumən /

A1
  • adjecitve
  • Concerning or characteristic of people
  • noun
  • A person; a man, woman or child
  • Subtitles section
  • Quick, close your eyes and imagine you're in a forest.
  • You're having a nice stroll, taking in the scenery, maybe humming a little tune when suddenly you spot a black bear.
  • Now, what color is the bear in your imagined scenario?
  • Black?
  • Are you sure about that?
  • I mean, you might be right, but it might be a blonde black bear, or a chocolate brown black bear, or even cinnamon red.
  • In the coastal regions of rainforests in British Columbia, there are even white black bears.
  • These spirit bears, as they're sometimes called, were kept secret by the indigenous First Nations in order to protect them from European fur traders.
  • The point is, despite their name, the black bear's coloring comes down to its genetics, which is influenced by the gene pool of its population, or the group of individuals living in the same area that are able to breed with each other.
  • See, at the population level, organisms undergo microevolution, evolution that is expressed through a change in gene frequency, usually within a short period of time.
  • Genetic changes in individuals are reflected in the population, which can help us understand why some black bears may actually be a rainbow of colors, and even how some tigers really can change their stripes.
  • Hi, I'm Dr. Sammy, your friendly neighborhood entomologist, and this is Crash Course Biology.
  • Now I want you to close your eyes and imagine the funkiest theme music that has ever lived.
  • Did you imagine this?
  • Whether
  • We're talking about tigers, tarantulas, or trees, it's populations that evolve, not individual organisms.
  • But each organism's fate, whether it lives or dies, whether it reproduces or doesn't, plays a role in what happens next in its population.
  • That's because each organism is a member of their population's gene pool.
  • That's the sum of all the genetic material spread across the entire population of a given species in a given area.
  • The gene pool includes, as you'd expect, genes, specific regions of DNA that encode instructions for different jobs, like making proteins or growing eyebrows.
  • But more specifically, the gene pool has alternate versions of genes called alleles.
  • Diversity is the currency of evolution, and alleles are the unit of that currency.
  • Like in the genetic code of cats, the piebald gene has alternate alleles associated with kitty coloring.
  • Depending on the alleles, they might result in no white spots, or just a pair of mittens, or the look of a permanent tuxedo.
  • Aww, look at you, Mortimer.
  • Always ready for a black tie event, but never invited to one.
  • Or the dilute gene, for example, affects how pigmented a cat's fur is no matter the color.
  • So with this set of alleles, an orange cat would be a bright, rich shade of sherbert.
  • But with this set of alleles, an orange cat would be pastel, like peaches and cream.
  • It's the same gene, the same region in the genetic code, where the allele variation dictates outcomes that vary within a population.
  • In humans, almost nothing in our appearance gets determined by a single gene.
  • But like cats and many other organisms, we inherit alleles from our parents.
  • Your inherited alleles decide your eye color or your hair color, but they also influence your risk of developing certain diseases or allergies.
  • Each organism has a set of alleles unique to them, and those alleles are tally marks in the bigger gene pool of their population.
  • Depending on which organisms survive and pass on their DNA, some alleles become more common over generations, while others become more rare.
  • These fluctuations are the stuff that microevolution is made of.
  • Sometimes a trait takes hold because it helps individuals that have that trait survive and reproduce successfully in their environment.
  • A process called natural selection.
  • You may have heard the term natural selection before.
  • It's one of those rare scientific phrases that's gained mainstream popularity, like chemicals or climate change or colony collapse disorder.
  • And like any science-y word that makes it big, it comes with some misconceptions attached.
  • We'll talk more about natural selection, and its less-famous sibling artificial selection, in our next episode.
  • But for now, just know that natural selection is the way that species adapt to their environment.
  • It's one of the driving forces behind evolution.
  • But natural selection isn't the only force driving evolution.
  • There's also sheer random chance.
  • A process called genetic drift happens when chance events cause alleles to spike or decline from one generation to the next.
  • You can think of a population's gene pool kind of like a boat rocking back and forth in the ocean, holding a cargo of alleles.
  • A tiny tugboat is more likely to get tossed around, and more vulnerable to losing cargo or capsizing altogether.
  • But a big cruise ship has a better shot at staying steady in the rips and rolls of the ocean.
  • It might lose some deck chairs if a tropical storm blows through, but it still has some reserves.
  • In a similar way, larger populations aren't as vulnerable to genetic drift.
  • Their allele frequencies aren't as likely to change due to chance events, so they keep much of their diversity.
  • But small populations are more likely to see ups and downs in allele frequency, which can sometimes remove a color of fur, for example, from that population's equation entirely.
  • Not necessarily by selection, it's just up to random chance.
  • The founder effect is one powerful way that genetic drift happens.
  • That's when a small population splits off and becomes isolated from others, founding a new population.
  • Let's take a look at the founder effect in the Thought Bubble.
  • In eastern India, you might meet a tiger of a different stripe.
  • Not the cats with the classic orange suit and the black pinstripes featured famously on cereal boxes, but stripes so broad that the pattern looks almost reversed.
  • Black background, orange stripes.
  • Over one-third of the tigers in India's Samalipal National Park have this pattern which is exceedingly rare anywhere else.
  • These so-called Black Tigers likely owe their pattern to a special recipe.
  • A dash of random chance served up in a tiny, isolated population.
  • Tigers with this pattern have two copies of an uncommon allele associated with the gene also linked to dark, splashy patterns in cheetahs and domestic cats.
  • The rare allele has a high frequency in the Samalipal tiger population, comprising an estimated 58% of the alleles in the gene pool.
  • And that's because the population in this area probably began with just two or three founders.
  • And they've been isolated from other tiger populations for at least 10 generations, so there are no new potential mates to mix things up by introducing new genes through reproduction.
  • With each generation, genetic drift has happened, increasing the chances that a tiger inherits dark alleles from their parents.
  • That's the power of the Founder Effect.
  • Given the right ingredients, even a rare allele can drift into a common one.
  • And even a tiger can change its stripes.
  • Well, a population of them at least.
  • Thanks, Thought Bubble.
  • So the Founder Effect happens when a smaller population becomes isolated from the original.
  • But there are other events that can cause changes in a population.
  • Catastrophic loss from an outside force, such as a fire or a hurricane, can cause alleles to randomly drift because the population loses individuals, regardless of how well they were adapted to the environment.
  • This drastic depletion of the gene pool is called the Bottleneck Effect, because it's kind of like shaking just a few marbles out of a bottle.
  • The original bottle might have a wide variety of colors.
  • Yellow, blue, orange, whatever the heck chartreuse is.
  • But just a few marbles tumble out onto your hand, and in a narrower range of colors.
  • It's the same story with alleles.
  • The proportion of alleles in the surviving population will be different than it was before the population loss that led to the bottleneck.
  • And in a newly tiny population, those alleles will be more likely to drift for the generations to come.
  • Today's northern elephant seals, for example, number at over 200,000 strong.
  • But they're all descended from the same 20 or so individuals that survived being hunted to near extinction in the 19th century, so there's not a ton of variation in their alleles.
  • These genetic dips and dives can happen to any population of living things, whether it's tiny bacteria or an endangered fungus.
  • And there's yet another force that can nudge allele frequencies, even counteracting the effects of drift—gene flow.
  • Gene flow happens when individuals move and breed between different populations, bringing new alleles in or out.
  • Like, if a separate population of tigers did somehow find the isolated black tigers of Similipal, they might breed with the locals, infusing the gene pool with new alleles.
  • But new alleles can also arise spontaneously, without any movement between populations at all.
  • Like mutations, which are random changes in genes that can happen because of mistakes when copying DNA.
  • Or there can be random changes in chromosomes, the DNA molecules that hold the genetic information, resulting in genes switching locations or even duplicating.
  • And that can fall on a spectrum between actively harmful, fairly neutral, or even pretty useful.
  • Like, we humans, and other mammals, share a long-ago ancestor that probably only had one gene for detecting odor.
  • But this gene has duplicated many times since then.
  • So now we've got around 400 odor-distinguishing genes.
  • All the better to select the right port-o-potty at that outdoor concert.
  • I hope that toilet humor wasn't too on-the-nose for you.
  • You get it?
  • No?
  • I'm sorry.
  • So yeah, there are multiple forces that can affect the microevolution of a population.
  • Like, the rare allele responsible for white coats of spirit bears probably arose due to genetic drift.
  • But it might also have an advantage in their environment.
  • Spirit bears might have an edge at salmon fishing, for example, making them harder to spot from a fish's perspective.
  • Like, maybe they look like clouds.
  • Biologists need a way of measuring and modeling all these changes.
  • And for that, they have the Hardy-Weinberg equation.
  • This equation assumes a hypothetical scenario where a population isn't devolving and its allele frequencies are totally steady.
  • A population like that would have to be enormous, with no gene flow and no mutations.
  • All mating would be random, and no organism would be better at reproducing than any other.
  • This sort of population would likely never arise in nature.
  • But biologists use this imaginary, never-evolving equilibrium as a baseline to measure and compare genetic changes.
  • By plugging in actual allele frequencies, which can be measured by counting how many times the allele appears in the population, and dividing by the total number of copies for the gene, the Hardy-Weinberg equation can reveal whether real-life populations are evolving.
  • In fact, the Hardy-Weinberg equation is so important that it is the theoretical bedrock of a whole field of biology called population genetics, which is all about nerding out over the genetic composition of populations and their changes over time.
  • But hey, is there any scientific field that doesn't include nerding out over something cool?
  • I mean, that's kind of our whole thing.
  • It's thanks to the enthusiasm of scientists over things like genes, natural selection, and microevolution that we understand why evolution doesn't occur with the individual, but with the population, and why a tiger might not be able to change its stripes,
  • But a population of them can.
  • With each new generation, different forces can push some alleles to become more common, and some alleles to become more rare.
  • These spikes and declines can happen due to random chance.
  • But alleles can also become more common because they help organisms survive and reproduce in their environment.
  • In our next episode, we'll talk more about how selection, not just random chance, plays a role in evolution.
  • I'll see you then!
  • This series was produced in collaboration with HHMI BioInteractive.
  • If you're an educator, visit biointeractive.org slash Crash Course for classroom resources and professional development related to the topics covered in this course.
  • Thanks for watching this episode of Crash Course, which was filmed in Indianapolis, Indiana, and was made with the help of all of these nice people.
  • If you want to help keep Crash Course free for everyone, forever, you can join our community on Patreon.