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How to See Really Tiny Things Without Killing Them

Video vocabulary

gecko

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US / 'ɡekəʊ /

UK / 'ɡekoʊ /

C1
  • noun
  • Small chiefly tropical, nocturnal lizard

surface

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US / 'sɜ:fɪs /

UK / ˈsɚfəs /

A2
  • adjecitve
  • Of the top layer; not deep or meaningful
  • noun
  • Top layer of the ground or of water
  • Nature or emotions that show, but may not be true
  • Outside or upper layer of something
  • verb
  • To give (road) a top layer
  • To appear after being hidden, unseen, or unknown
  • To come to the top of something; emerge
  • To come to the top level of water, mud, etc.

visible

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US / ˈvɪzəbl /

UK / ˈvɪzəbəl /

B1
  • adjecitve
  • Can see, easily seen or understood
  • Being obvious or easy to see

body

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US / ˈbɒd.i /

UK / ˈbɑdi /

A1
  • noun
  • An object distinct from other objects
  • A group of people involved in an activity together
  • Main part of something
  • A person's physical self

breast

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US / brest /

UK / brɛst /

B1
  • noun
  • Fleshy part of a woman's body for feeding babies
  • (Poetic) upper front part of the body; the heart

below

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US / bɪ'ləʊ /

UK / bɪˈlo /

A1
  • preposition
  • In a lower position, place, or level

image

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US / 'ɪmɪdʒ /

UK / ˈɪmɪdʒ /

A2
  • noun
  • Picture, sculpture or painting of something
  • General idea or opinion of something
  • verb
  • To obtain pictures by scanning them with a machine

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

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

phenomenon

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US / fə'nɒmɪnən /

UK / fɪˈnɑməˌnɑn, -nən /

B1
  • noun
  • Unusual event, fact that can be studied
  • Interesting or unusual person, group
  • something that exists and can be seen, felt, tasted, etc., especially something unusual or interesti

pump

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US / pʌmp /

UK / pʌmp /

B1
  • noun
  • A device more moving liquids
  • Light woman's shoe
  • verb
  • To make liquid or gas flow in a particular direction
  • To make water/other liquid move using a machine
  • To move in or out, or up and down quickly
  • asking for information in an indirect way

run

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US / rʌn /

UK / rʌn /

A1
  • noun
  • Journey between two places made by ship or car
  • Series of similar things or successes and failures
  • Act of running; exercise of running
  • verb
  • To depart or travel according to a schedule
  • To cause an animal to move in a certain direction
  • (Of an engine) to be operating
  • To start or use a computer program
  • To flow in a certain direction, like a liquid
  • To manage or operate a business
  • To operate or drive something
  • (Of a road) to go from one place to another
  • To move your legs faster than walking

treat

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US / tri:t /

UK / trit /

A1
  • noun
  • Something you buy for others as a surprise present
  • something that tastes good and that is not eaten often
  • verb
  • To pay for the food or enjoyment of someone else
  • To use medical methods to try to cure an illness
  • To act in a certain way toward someone

alone

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US / ə'ləʊn /

UK / əˈlon /

A1
  • adjecitve
  • Apart from others
  • Without equal
  • adverb
  • Without anyone or anything else

glory

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US / 'ɡlɔ:rɪ /

UK / ˈɡlɔri, ˈɡlori /

B1
  • noun
  • State of having respect, honor or pride
  • Condition of great beauty, success, or influence

electricity

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US / ɪˌlekˈtrɪsəti /

UK / ɪlɛkˈtrɪsɪti,ˌilɛk- /

A2
  • noun
  • Energy generated positive and negative charges

eyeglass

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US / ˈaɪɡlɑːs /

UK / ˈaɪɡlæs /

A1
  • other
  • Lens for correcting defective vision in one eye; held in place by facial muscles

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

molecular

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US / mə'lekjələ(r) /

UK / məˈlɛkjəlɚ /

B2
  • adjecitve
  • About or caused by molecules

researcher

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US / rɪ'sɜ:tʃə(r) /

UK / rɪˈsətʃɚ /

A2
  • noun
  • Someone who works to find new facts and ideas

proverbial

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US / prəˈvɜ:biəl /

UK / prəˈvɜ:rbiəl /

B2
  • adjecitve
  • As commonly spoken of; well-known

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

click

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US / klɪk /

UK / klɪk /

A1
  • noun
  • The sound a computer mouse makes when you press it
  • A short, slight, and sharp sound
  • verb
  • To work well with someone or something
  • To press a computer mouse
  • To make a short, slight, and sharp sound

dehydrate

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US / di:'haɪdreɪt /

UK / diˈhaɪˌdret /

C2
  • verb
  • To cause (skin, body) to lose water that is needed

diffraction

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US / dɪ'frækʃn /

UK / dɪ'frækʃn /

C1
  • noun
  • Bending light, etc. around something/through a hole

favourite

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US / ˈfeɪvərɪt /

UK / 'fevərɪt /

A1
  • adjecitve
  • Best liked or most enjoyed
  • noun
  • A thing that someone likes best or enjoys most

giant

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US / 'dʒaɪənt /

UK / ˈdʒaɪənt /

A2
  • adjecitve
  • Very large, or much bigger than other things
  • noun
  • Tall, large, and powerful human-like creatures
  • Very successful, powerful person or organization

map

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US / mæp /

UK / mæp /

A1
  • noun
  • Diagram showing the geography of an area
  • verb
  • To draw a diagram to show the geography of an area
  • To find points of similarity between things

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

half

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US / hɑ:f /

UK / hæf, hɑf /

A1
  • adjecitve
  • Not complete
  • adverb
  • Partly; somewhat
  • noun
  • One of two equal periods of game time in a sport
  • The part you get when one is divided into two;

frozen

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US / 'frəʊzn /

UK / ˈfroʊzn /

A2
  • adjecitve
  • Hard, solid because it is below zero degrees
  • verb
  • To store an item of food in a cold place
  • To make someone to not want to communicate
  • To stop moving and be still; stay the same

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

scurry

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US / 'skʌrɪ /

UK / ˈskə:ri, ˈskʌri /

C1
  • verb
  • To move quickly and with short steps, as to hide

also

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US / 'ɔ:lsəʊ /

UK / ˈɔlso /

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

cancerous

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US / 'kænsərəs /

UK / ˈkænsɚrəs /

B1
  • adjecitve
  • Being a growth caused by abnormal cell division

fine

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US / faɪn /

UK / faɪn /

A2
  • adjecitve
  • Good, acceptable or satisfactory
  • Of high quality; made with great skill
  • In a careful or exact manner; into small pieces
  • Being of high quality
  • Good; okay; no problem
  • (Of weather) good; not raining
  • noun
  • Money you have to pay because you broke a rule
  • verb
  • To pay money because you broke a law

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

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

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)

you

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US / jʊ /

UK / ju /

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

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

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

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

diffract

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US / dɪˈfrækt /

UK / dɪˈfrækt /

A1
  • other
  • Undergo diffraction

forward

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US / 'fɔ:wəd /

UK / ˈfɔrwəd /

A1
  • adjecitve
  • Toward what is ahead; in front
  • Acting in a socially aggressive manner; pushy
  • adverb
  • Toward the front in place; in front
  • Toward a future time; to a more advanced state
  • verb
  • To send something to another address or person

gooey

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US / ˈgu:i /

UK / ˈɡui /

C1
  • adjecitve
  • Soft and sticky

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

love

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US / lʌv /

UK / lʌv /

A1
  • noun
  • Person's name
  • A very strong feeling of affection
  • The person you care very deeply about
  • Strong, deep emotional and sexual attraction
  • verb
  • To care for and like someone very strongly, deeply
  • To like doing very much; enjoy greatly
  • To feel a strong emotional and romantic attraction

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

microscopy

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US / maɪˈkrɒskəpi /

UK / maɪˈkrɑ:skəpi /

B1
  • noun
  • Research with the use of microscopes

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

prostate

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US / ˈprɒsteɪt /

UK / ˈprɑsˌtet /

B2
  • noun
  • Male gland important in the creation of semen

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

pull

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US / pʊl /

UK / pʊl /

A1
  • noun
  • Act of breathing in smoke, as from a pipe
  • Force something has that draws other things to it
  • Using your hands to move something to you
  • verb
  • To breathe in smoke, as from a pipe
  • To hold something and move it toward you
  • To remove something by force

turn

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US / tɜ:n /

UK / tɚn /

A1
  • noun
  • Place where changing of direction happens
  • Your time or chance to perform a duty
  • Your chance to play or do in say a game
  • Unexpected change, as in the weather
  • verb
  • To become (a particular age)
  • To become a different quality, color, etc.
  • To change the direction of something, e.g. a car
  • To move in an opposite direction or position
  • To shape metal with a spinning tool

than

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US / ðən /

UK / ðən /

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

atomic

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US / əˈtɒmɪk /

UK / əˈtɑ:mɪk /

B1
  • adjecitve
  • Concerning atoms

head

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US / hed /

UK / hɛd /

A1
  • noun
  • Counter for the number of cattle
  • Natural mental ability or intelligence
  • Leader or person with the greatest authority
  • Mind; mental ability; mental state
  • Side of a coin with a head on it
  • Top part of your body with eyes and a mouth
  • Starting point of something, e.g. a river
  • verb
  • To hit a ball with your head in a game
  • To be first or at the front or top (e.g. a list)
  • To travel or move toward a particular place; To go in a particular direction
  • To become the leader of something
  • To lead or be responsible for something

traditional

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US / trəˈdɪʃənl /

UK / trəˈdɪʃənəl /

A2
  • adjecitve
  • Involved in a custom or event common to a people

conductive

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US / kənˈdʌktɪv /

UK / kənˈdʌktɪv /

A1
  • adjecitve
  • Having the quality of conducting heat, electricity

molecule

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US / ˈmɒlɪkju:l /

UK / ˈmɑlɪˌkjul /

B2
  • noun
  • Two or more atoms chemically combined

light

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US / laɪt /

UK / laɪt /

A1
  • adjecitve
  • Being bright making it easy to see; not dark
  • Being pale and lacking darkness of color
  • Not heavy; weighing only a little
  • adverb
  • Carrying few bags when traveling
  • noun
  • A source of energy that makes a room or area bright
  • Way in which something or someone is understood
  • verb
  • To cause something to burn; put a burning match to
  • To provide a way to see ahead

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

sweet

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US / swi:t /

UK / swit /

A1
  • adjecitve
  • Having a gentle, likable nature
  • Making one feel happy, pleased or content
  • Cute in appearance
  • Tasting like sugar; containing sugar
  • noun
  • Piece of candy, or other food containing sugar

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

van

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US / væn /

UK / væn /

A2
  • noun
  • Truck with an enclosed cargo space

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

grinder

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US / ˈgraɪndə(r) /

UK / ˈɡraɪndɚ /

B2
  • noun
  • Long crusty roll filled with meats and cheese

improvement

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US / ɪmˈpru:vmənt /

UK / ɪmˈpruvmənt /

A2
  • noun
  • Addition or change that makes something better

kill

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US / kɪl /

UK / kɪl /

A1
  • noun
  • Animal killed by a person or other animal
  • verb
  • To cause someone to experience a lot of pain
  • To end the life of a person or other living thing
  • To be very funny
  • To prevent something from continuing or operating
  • To do something unimportant to pass time quickly

job

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US / dʒɒb /

UK / dʒɑ:b /

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

per

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US / pə(r) /

UK / pɚ /

A2
  • preposition
  • In the manner directed or suggested
  • For each; during each

compound

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US / 'kɒmpaʊnd /

UK / kɑmˈpaUnd /

B1
  • adjecitve
  • (Of a term) created by combining two or more words
  • noun
  • Series of buildings that are walled or fenced off
  • Chemical made up of several others
  • Closed walled area, as in a prison
  • Something formed by combining elements/parts
  • Term created by using two or more words together
  • verb
  • To pay interest on a loan including the interest
  • To make something from various parts or components
  • To make a mistake or problem worse

for

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US / fə(r) /

UK / fɔr,fə /

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

frequency

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US / 'fri:kwənsɪ /

UK / ˈfrikwənsi /

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

necessarily

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US / ˌnesəˈserəli /

UK / ˌnɛsɪˈsɛrəli, -ˈsɛr- /

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

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

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

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

blurry

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US / ˈblɜ:ri /

UK / ˈblə:ɪ /

B2
  • adjecitve
  • Being indistinguishable or unclear in shape

descendant

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US / dɪˈsendənt /

UK / dɪˈsɛndənt /

C1
  • noun
  • Family member from generations following you

friction

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US / ˈfrɪkʃn /

UK / ˈfrɪkʃən /

B2
  • noun
  • Disagreement between two or more people
  • Force preventing motion between bodies in contact

kicking

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US / ˈkɪkɪŋ /

UK / ˈkɪkɪŋ /

A2
  • verb
  • To hit or move something with the foot

object

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US / 'ɒbdʒɪkt /

UK / ˈɑbdʒɪkt /

A2
  • noun
  • Something you can see or touch, but is not alive
  • Goal or purpose of a particular plan or activity
  • The thing that the action of a verb acts upon
  • verb
  • To disagree; to protest against an idea or plan

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

steroid

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US / ˈsterɔɪd /

UK / ˈstɪrˌɔɪd, ˈstɛr- /

B2
  • noun
  • Drug making muscles bigger and giving more energy

wonder

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US / 'wʌndə(r) /

UK / ˈwʌndɚ /

A1
  • noun
  • Surprise caused by experiencing something amazing
  • verb
  • To feel curious about something
  • To think or consider about something over time

wrap

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US / ræp /

UK / ræp /

B1
  • noun
  • Piece of clothing worn loosely on the shoulders
  • Thin bread filled with food and rolled
  • verb
  • To be or move around something
  • To cover something with paper or a cloth e.g. gift

awesome

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US / 'ɔ:səm /

UK / ˈɔsəm /

B2
  • adjecitve
  • Great; wonderful; stupendous

capable

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US / 'keɪpəbl /

UK / ˈkepəbəl /

A2
  • adjecitve
  • Being able to do something very well; proficient

few

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US / fju: /

UK / fju /

A1
  • pronoun
  • Not many, a small number

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

under

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US / ˈʌndə(r) /

UK / ˈʌndɚ /

A1
  • adjecitve
  • In the same place as another thing, but lower
  • adverb
  • In a lower quantity or price than expected
  • preposition
  • According to the terms of an agreement or law
  • Managed or controlled by the authority of
  • Being of a lesser quality or amount than expected
  • Influenced or affected by something or someone
  • Less or lower in age, amount, size or number

limit

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US / 'lɪmɪt /

UK / ˈlɪmɪt /

A2
  • noun
  • Point beyond which it is not possible to go
  • verb
  • To stop or prevent an increase past a point

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

test

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US / test /

UK / test /

A1
  • noun
  • A medical examination
  • Action to establish the truth or nature of
  • Examination; questions to measure knowledge
  • verb
  • To be given a medical examination
  • To try to establish the truth or nature of
  • To ask a series of questions to measure knowledge

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

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

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)

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

technology

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US / tek'nɒlədʒɪ /

UK / tɛkˈnɑlədʒi /

A2
  • noun
  • Use or knowledge of science in industry etc.

act

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US / ækt /

UK / ækt /

A1
  • noun
  • What someone did; action; behavior
  • A law or rule passed by a government we must obey
  • One of the parts that a stage play is divided into
  • verb
  • To behave in a certain way
  • To perform on a stage or in a movie

country

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US / ˈkʌntri /

UK / ˈkʌntri /

A1
  • noun
  • An area of land that is controlled by a government
  • Open land that is away from towns and cities

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

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

miss

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US / mɪs /

UK / mɪs /

A1
  • noun
  • Action of not hitting something or someone
  • Form of address to unmarried girl or woman
  • verb
  • To be absent
  • To fail to hit something e.g. a ball
  • To do without something
  • To fail to see or sense something
  • To fail to understand someone's message
  • To be too late to ride on something e.g. train
  • To feel you want to see someone who is not there

prep

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US / prep /

UK / prɛp /

A1
  • adjecitve
  • Preparation for an action or event
  • noun
  • Shortened form of 'preparation school'

scishow

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US / /

UK / /

A1

thank

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US / θæŋk /

UK / θæŋk /

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

add

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US / æd /

UK / æd /

A1
  • verb
  • To include as well
  • To put two things or numbers together, e.g. 2+2

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

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

slam

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US / slæm /

UK / slæm /

B1
  • noun
  • Act or sound of closing a door, etc. violently
  • verb
  • To criticize sharply
  • To shut with a lot of force, making a loud noise

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

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

biology

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US / baɪˈɒlədʒi /

UK / baɪˈɑlədʒi /

A2
  • noun
  • The study of living things

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”

fast

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US / fɑ:st /

UK / fæst /

A1
  • adjecitve
  • In a way that is difficult to move or change
  • Moving or able to move quickly
  • Showing time that is later than the actual time
  • adverb
  • With a great deal of speed
  • noun
  • Period of time when a person chooses not to eat
  • verb
  • To refuse food for a long time

receptor

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US / rɪˈseptə(r) /

UK / rɪˈseptər /

B2
  • noun
  • A nerve ending that changes stimuli into impulses

super

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US / ˈsu:pə(r) /

UK / ˈsupɚ /

A2
  • adjecitve
  • Of the highest quality; great; marvelous

top

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US / tɒp /

UK / tɑp /

A1
  • adjecitve
  • Being good or great; excellent
  • Being the most in degree or quality
  • noun
  • Item of clothing covering shoulders to waist, hips
  • A cover or lid
  • Part (e.g. road) that is the furthest away
  • Highest or upper part or point of something
  • Best or highest status or position
  • Flat upper surface or edge of an object
  • Child's toy that spins on its point
  • Upper section or leaves of fruits and vegetables
  • Winning in a sport or contest
  • verb
  • To be higher or larger than a specific value
  • To arrive at the highest point of something
  • To put a cover or layer or over something
  • To kill; murder
  • To hold the highest position on a list
  • To be more important, successful or better than
  • To beat someone or win at a game

bump

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US / bʌmp /

UK / bʌmp /

B1
  • noun
  • Act or sound of one solid object hitting another
  • Raised area on any smooth surface
  • verb
  • To bounce along over a rough surface
  • To knock against with force or violence
  • To move someone to a different group, time or area

damage

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US / ˈdæmɪdʒ /

UK / ˈdæmɪdʒ /

A2
  • noun
  • Physical harm that is done to something
  • verb
  • To harm physically; to hurt or break something

everything

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US / 'evrɪθɪŋ /

UK / ˈɛvriˌθɪŋ /

A1
  • pronoun
  • All of the things mentioned

network

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US / ˈnetwɜ:k /

UK / ˈnetwɜ:rk /

A2
  • noun
  • Group of computers connected to each other
  • System of connections
  • Group who work closely with each other
  • Group of radio or television stations, programs
  • verb
  • To join a group of computers together
  • To exchange information with colleagues, contacts

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

they

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US / ðeɪ /

UK / ðe /

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

very

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US / 'verɪ /

UK / ˈvɛri /

A1
  • adjecitve
  • Concerning a large degree or amount
  • adverb
  • A lot; much; many
  • Used to stress or emphasize a noun

account

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US / ə'kaʊnt /

UK / əˈkaʊnt /

A1
  • noun
  • An advantage
  • Arrangement with a bank to keep your money for you
  • An invoice for things bought
  • Arrangement whereby you can use online services
  • A description, often written, of events; report

coronavirus

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US / kɒrənə'vaɪrəs /

UK / kɒrənə'vaɪrəs /

A1
  • noun
  • Any of a group of RNA viruses that cause a variety of diseases in humans and other animals.

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

speed

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US / spi:d /

UK / spid /

A2
  • noun
  • How fast or slow something is or is done
  • verb
  • To move quickly when completing an action
  • To drive a vehicle faster than laws allow

death

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US / deθ /

UK / dɛθ /

A2
  • noun
  • When someone dies; the end of life

diagnose

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US / ˈdaɪəgnəʊz /

UK / ˌdaɪəgˈnoʊs /

B1
  • verb
  • To determine the cause of an illness or problem

figure

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US / ˈfiɡə /

UK / ˈfɪɡjɚ /

A1
  • noun
  • Your body shape
  • Numbers in a calculation
  • Doll-like thing meant to represent a person
  • Picture or diagram giving information in a text
  • Person who is very important or famous
  • Shape of a person seen indistinctly or in outline
  • Amount that is expressed in numbers
  • verb
  • To appear in a game, play or event
  • To calculate how much something will cost
  • To understand after thinking; work out

huge

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US / hju:dʒ /

UK / hjudʒ /

A2
  • adjecitve
  • Very very large

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

their

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US / ðɛː /

UK / ðer /

A1
  • determiner
  • Belonging to them

technique

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US / tekˈni:k /

UK / tɛkˈnik /

A2
  • noun
  • Way of doing by using special knowledge or skill

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

build

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US / bɪld /

UK / bɪld /

A1
  • noun
  • Your physical shape; physique
  • verb
  • To establish e.g. a reputation, over time
  • To construct a house, office, factory

critter

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US / ˈkrɪtə(r) /

UK / ˈkrɪtɚ /

A1
  • noun
  • Regional term for 'creature' (especially for domestic animals)

string

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US / strɪŋ /

UK / strɪŋ /

A2
  • noun
  • A line of connected objects
  • Thick thread; thin rope
  • verb
  • To tie or connect things together with a thread

work

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US / wɜ:k /

UK / wɚk /

A1
  • adjecitve
  • Activity completed in order to make money
  • noun
  • The product of some artistic or literary endeavor
  • Everything created by an author, artist, musician
  • Activity you do in order to make money
  • Place of employment
  • Final product or result of a some labor or effort
  • verb
  • To bring into a specific state of success
  • To be functioning properly, e.g. a car
  • To do your job in your company or workplace
  • To make an effort to do something
  • To operate a machine or device

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

lens

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US / lenz /

UK / lɛnz /

B1
  • noun
  • Structure in the eye or camera that focuses light
  • other
  • Pieces of glass or plastics to improve vision

subatomic

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US / ˌsʌbəˈtɒmɪk /

UK / ˌsʌbəˈtɑmɪk /

B1
  • adjecitve
  • Concerning constituents of the atom

show

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US / ʃəʊ /

UK / ʃo /

A1
  • noun
  • False display of love, emotion or action
  • An event for displaying or promoting goods
  • Play, opera or theater production
  • Presentation that is broadcast on TV or radio
  • verb
  • To be easily seen or displayed
  • To display your emotions or feelings
  • To let someone see something; display
  • To explain or teach how something is done
  • To lead someone somewhere; point them to something
  • To prove something to be true, correct
  • To reveal or allow something to be seen

space

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US / speɪs /

UK / spes /

A1
  • noun
  • Empty area kept for a specific reason, like a car
  • Empty area with nothing in it
  • Area in the sky where the stars are
  • Area between written words on a page
  • verb
  • To make a certain distance or time between

virus

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US / 'vaɪrəs /

UK / ˈvaɪrəs /

B1
  • noun
  • File secretly put on computers to cause harm
  • Living organism that causes disease or sickness

actually

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US / ˈæktʃuəli /

UK / ˈæktʃuəli /

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

nanoscale

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US / /

UK / /

A1
  • adjective
  • Of a size measurable in nanometers or microns.

stick

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US / stɪk /

UK / stɪk /

A2
  • noun
  • Long thin piece of wood from a tree
  • verb
  • To push a sharp or pointed object into something
  • To join together using glue or paste
  • To remain in one place or position for a long time

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

global

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US / ˈgləʊbl /

UK / ˈgloʊbl /

A2
  • adjecitve
  • Concerning, involving, affecting all of something
  • Of, affecting, or involving the entire world

interact

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US / ˌɪntər'ækt /

UK / ˌɪntɚˈækt /

A2
  • verb
  • To talk or do things with each other

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

plop

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US / plɒp /

UK / plɑp /

B2
  • noun
  • Sound made when a solid is dropped into a liquid
  • verb
  • To make a sound by falling into liquid

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

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

capture

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US / 'kæptʃə(r) /

UK / ˈkæptʃɚ /

B1
  • verb
  • To attract and hold e.g. interest, attention
  • To record, tape, or film something
  • To catch and prevent from being free
  • To take control of a place or object by force

healthy

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US / ˈhelθi /

UK / ˈhɛlθi /

A1
  • adjecitve
  • In good condition physically, or financially; well

machinery

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US / məˈʃi:nəri /

UK / məˈʃinəri, -ˈʃinri /

A2
  • noun
  • System/processes to get official approval, etc.
  • Machines in general
  • Inner, working parts of a machine

past

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US / pɑ:st /

UK / pæst /

A2
  • adjecitve
  • No longer current or new
  • adverb
  • So as to go beyond, or further than something
  • noun
  • Time that existed before now, e.g. long ago
  • preposition
  • After a particular time
  • At a later point in distance; beyond

too

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US / tu: /

UK / tu /

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

bacterium

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US / bæk'tɪərɪəm /

UK / bækˈtɪriəm /

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

compute

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US / kəm'pju:t /

UK / kəmˈpjut /

A1
  • verb
  • To find out by calculating or estimating

fold

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US / fəʊld /

UK / fold /

B1
  • noun
  • Pen where sheep are kept
  • Group of people who have a common belief
  • verb
  • To bend one part of something against another
  • (Of business) to fail or close down
  • To hold something together such as your two arms

exactly

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US / ɪgˈzæktli /

UK / ɪɡˈzæktli /

A1
  • adverb
  • No more and no less than; precisely

miniaturize

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US / ˈmɪnətʃəraɪz /

UK / ˈmɪniətʃəˌraɪz, ˈmɪnə- /

C2
  • verb
  • To make a smaller copy of something

after

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US / 'ɑ:ftə(r) /

UK / ˈæftɚ /

A1
  • adverb
  • Later than another time, or behind something
  • conjunction
  • Following something before
  • preposition
  • When an event happened or time has passed

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

drug

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US / drʌɡ /

UK / drʌɡ /

A2
  • noun
  • Illegal substance taken for effect on the mind
  • Chemical used as a medicine
  • verb
  • To give drugs to someone to make them sleep

liquid

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US / ˈlɪkwɪd /

UK / ˈlɪkwɪd /

A2
  • adjecitve
  • (Of wealth) being able to be spent as cash
  • In a state of being uncertain
  • Moving in a flowing manner, like water or oil
  • noun
  • Something that is similar to the state of water

processes

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US / ˈprəʊsesɪz , prəˈsesɪz /

UK / ˈprɑːsesɪz , prəˈsesɪz /

B1
  • other
  • Sets 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

stiff

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US / stɪf /

UK / stɪf /

B1
  • adjecitve
  • Frozen still due to fear or anger
  • Not able to be bent
  • noun
  • Slang term for a dead body

der

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US / /

UK / /

A1

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

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

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

either

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US / ˈaɪðə(r) /

UK / ˈiðɚ, ˈaɪðɚ /

A1
  • adjecitve
  • One of two (used when there is a choice of two)
  • adverb
  • (After negative statements) likewise, in addition
  • conjunction
  • Used as the first of two connected things
  • determiner
  • Used as the first of two connected things
  • pronoun
  • The one or the other

here

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US / hɪə(r) /

UK / hɪr /

A1
  • adverb
  • In this place; at this location, position or time

optical

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US / ˈɒptɪkl /

UK / ˈɑptɪkəl /

B1
  • adjecitve
  • Concerning vision or helping people see
  • Concerning light, lenses or cameras

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

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

scan

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US / skæn /

UK / skæn /

B1
  • noun
  • A look inside the body with a special machine
  • verb
  • To look inside of the body with a special machine
  • To look at something very quickly for information
  • To look at all parts to find something
  • To make a digital copy of an image or a paper

tenth

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US / tenθ /

UK / tɛnθ /

A1
  • noun
  • 10th

try

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US / traɪ /

UK / traɪ /

A1
  • noun
  • Act of putting the ball over the rugby goal line
  • verb
  • To make an effort, to attempt to do something
  • To examine someone or something in a court of law
  • To test to see if it is good or you like it
  • To make a person go through hardship; test
  • To examine something to see if it works

novel

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US / 'nɒvl /

UK / ˈnɑvəl /

A2
  • adjecitve
  • Unusual and new or different from previous things
  • noun
  • Written fiction story

particle

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US / ˈpɑ:tɪkl /

UK / ˈpɑrtɪkəl /

B1
  • noun
  • Adverb or preposition that joins with a verb
  • Tiny piece or quantity of something

perfectly

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US / ˈpɜ:fɪktli /

UK / ˈpəfɪktli /

A2
  • adverb
  • In a faultless manner; without mistakes

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

investigate

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US / ɪn'vestɪɡeɪt /

UK / ɪnˈvɛstɪˌɡet /

A2
  • verb
  • To try to find out facts; to carry out research

mess

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US / mes /

UK / mɛs /

A2
  • noun
  • Something that is untidy, dirty or unclean
  • verb
  • To make something untidy or dirty

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

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

affect

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US / ə'fekt /

UK / əˈfɛkt /

A2
  • verb
  • To cause a change in something else

brand

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US / brænd /

UK / brænd /

A2
  • noun
  • A mark burned on an animal to show who owns it
  • Product made or designed by a named company
  • verb
  • To burn a mark on an animal to show who owns it
  • To describe someone as a liar, coward, etc.
  • To give a famous name to a product or service

cancer

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US / 'kænsə(r) /

UK / ˈkænsɚ /

B1
  • noun
  • Any growth caused by abnormal cell division

detect

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US / dɪˈtekt /

UK / dɪˈtɛkt /

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

electron

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US / ɪˈlektrɒn /

UK / ɪˈlektrɑ:n /

B2
  • noun
  • A negatively charged particle

put

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US / pʊt /

UK / pʊt /

A1
  • phrasal verb
  • to make a light stop shining by pressing or moving a switch
  • verb
  • To move or place a thing in a particular position
  • To rate something in importance or value
  • To write or say something in a certain manner

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

sentence

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US / 'sentəns /

UK / ˈsɛntəns /

A1
  • noun
  • Official punishment given by a court of law
  • Set of words that make a whole statement
  • verb
  • (Of a judge) to decide the punishment of

any

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US / 'enɪ /

UK / ˈɛni /

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

company

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US / 'kʌmpənɪ /

UK / ˈkʌmpəni /

A1
  • noun
  • Good feeling from being with someone else
  • A business that sells things or provides services
  • Guests, especially in your home
  • Being with another person rather than alone

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

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

game

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US / ɡeɪm /

UK / ɡem /

A1
  • noun
  • Activity with rules that people play to have fun
  • Birds and animals people hunt to kill and eat
  • Match between two teams

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

wave

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US / weɪv /

UK / wev /

A2
  • noun
  • Movement of sound, air or energy
  • Deep and strong emotion that is suddenly felt
  • Slightly curved shape in hair
  • Frequency of movement of objects together
  • Up and down movement of water in a lake or sea
  • Signal with your hand to say hello or goodbye
  • verb
  • To cause to move side to side or back and forth
  • To swing back and forth as a result of the wind
  • To move your hand or arm to say hello or goodbye

along

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US / əˈlɒŋ /

UK / əˈlɔ:ŋ /

A1
  • adverb
  • As a companion; taken with someone
  • preposition
  • At a point on a line

anything

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US / ˈeniθɪŋ /

UK / ˈɛniˌθɪŋ /

A1
  • pronoun
  • A thing of any kind

entirely

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US / ɪnˈtaɪəli /

UK / ɪnˈtaɪərli /

A2
  • adverb
  • Wholly; completely

form

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US / fɔ:m /

UK / fɔrm /

A1
  • noun
  • Sports team or person's current winning record
  • Document you complete when making an application
  • Visible shape or style; type; kind
  • verb
  • To organize something such as a club or group
  • To develop; to come into a shape or substance
  • To make something into a particular shape

from

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US / frəm /

UK / frʌm, frɑm,frəm /

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

hate

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US / heɪt /

UK / het /

A1
  • noun
  • Severe, deep sense of dislike or anger
  • An object that you hate
  • verb
  • To have a very strong feeling of dislike for

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

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

plenty

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US / 'plentɪ /

UK / ˈplɛnti /

A2
  • pronoun
  • When there is not too little of something; a lot

wiggle

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US / 'wɪɡl /

UK / ˈwɪɡəl /

C1
  • verb
  • To move from side to side with short fast movement

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

double

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US / 'dʌbl /

UK / ˈdʌbəl /

A2
  • adjecitve
  • Concerning or intended for use by two people
  • Two times the amount or degree; twice
  • Made of two parts that are the same, similar
  • noun
  • Person that is exactly like someone else
  • verb
  • To be used for two functions at the same time
  • To make or become twice as much

nucleus

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US / ˈnju:kliəs /

UK / ˈnu:kliəs /

B2
  • noun
  • Center of an atom
  • Control center of a cell
  • Most important part of something larger

picture

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US / 'pɪktʃə(r) /

UK / ˈpɪktʃɚ /

A1
  • noun
  • General situation or state of being
  • Mental image of what something is or looks like
  • Movie; film
  • Painting, drawing or photograph on paper or screen
  • verb
  • To understand or imagine something
  • To imagine someone or something in an image

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

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

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

counterpart

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US / ˈkaʊntəpɑ:t /

UK / ˈkaʊntərpɑ:rt /

B2
  • noun
  • Person/thing having same function/characteristics

biological

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US / ˌbaɪəˈlɒdʒɪkl /

UK / ˌbaɪəˈlɑdʒɪkəl /

B1
  • adjecitve
  • Being related to life and living things

commitment

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US / kə'mɪtmənt /

UK / kəˈmɪtmənt /

A2
  • noun
  • Permanent love or concern for person, thing
  • Promise or decision to do something for a purpose

frame

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US / freɪm /

UK / frem /

A2
  • noun
  • Structure that holds a picture or photo
  • A person's body shape determined by their skeleton
  • Main part of structures supporting the other parts
  • verb
  • To make a person that is not guilty appear guilty
  • To put say or write something in a careful way
  • To put a picture in a protective structure

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

invader

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US / ɪnˈveɪdə(r) /

UK / ɪnˈvedɚ /

B1
  • noun
  • Someone who enters to cause harm

helix

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US / 'hi:lɪks /

UK / ˈhilɪks /

C1
  • noun
  • Three-dimensional shape of a cone-like object

lot

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US / lɒt /

UK / lɑt /

A1
  • noun
  • What happens to a person in life from chance; fate
  • A group of people seen together
  • Item for sale at an auction
  • Small area of land used for a purpose e.g. parking

wriggle

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US / ˈrɪgl /

UK / ˈrɪɡəl /

B2
  • verb
  • To move somewhere by twisting, turning your body

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)

corpse

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US / kɔ:ps /

UK / kɔrps /

B2
  • noun
  • A dead body

footage

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US / ˈfʊtɪdʒ /

UK / ˈfʊtɪdʒ /

B2
  • noun
  • A certain amount of film or video of something
  • Measurement in feet

real

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US / rɪəl /

UK / ˈriəl, ril /

A1
  • adjecitve
  • Actually existing or happening, not imagined
  • Being important or special

early

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US / ˈɜ:li /

UK / ˈɜ:rli /

A1
  • adjecitve
  • Happening or appearing before
  • adverb
  • Coming/happening before others in a time sequence
  • Happening sooner than expected

large

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US / lɑ:dʒ /

UK / lɑ:rdʒ /

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

manipulate

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US / mə'nɪpjʊleɪt /

UK / məˈnɪpjəˌlet /

B1
  • verb
  • To try to control others to gain an advantage
  • To handle or work in a skillful manner

hang

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US / hæŋ /

UK / hæŋ /

A2
  • verb
  • To attach a picture, photograph etc. onto a wall
  • To float, move softly, or remain in the air
  • To kill by putting a rope around neck and dropping
  • To remain undecided, unsolved or unclear

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

stack

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US / stæk /

UK / stæk /

B1
  • noun
  • A large number or amount of something
  • Large tube through which smoke exits a building
  • verb
  • To arrange cards in a certain order, to cheat
  • To put one thing on top of another, e.g. boxes

membrane

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US / 'membreɪn /

UK / ˈmɛmˌbren /

B2
  • noun
  • Outside covering of a cell
  • A thin covering of tissue or of a cell

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

study

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US / 'stʌdɪ /

UK / ˈstʌdi /

A1
  • noun
  • Room that a person studies or reads in
  • Piece of research
  • Topic or subject you research or learn about
  • verb
  • To focus on learning something usually at school

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

but

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US / bət /

UK / bʌt,bət /

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

good

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US / ɡʊd /

UK / ɡʊd /

A1
  • adjecitve
  • Proper, appropriate or right
  • (Of an amount) enough; plenty
  • Excellent; high quality
  • Acting well or properly; of moral character
  • In a positive or happy emotional state
  • noun
  • Advantage or benefit

life

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US / laɪf /

UK / laɪf /

A1
  • noun
  • All the living things e.g. animals, plants, humans
  • Period of time things live, from birth to death

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

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

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

description

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US / dɪˈskrɪpʃn /

UK / dɪˈskrɪpʃən /

A2
  • noun
  • Explanation of what something is like, looks like

credit

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US / 'kredɪt /

UK / ˈkrɛdɪt /

A2
  • adjecitve
  • Having a positive amount of money
  • noun
  • System to buy something and pay for it later
  • Points earned instead of money
  • Quality of having a good reputation for a reason
  • Points earned towards a university degree
  • verb
  • To add a certain amount of money to a total
  • To recognize someone's achievements or help

freeze

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US / fri:z /

UK / friz /

A2
  • noun
  • Sudden stop to prevent increase or decreases
  • Period of very cold weather under zero degrees
  • verb
  • To harden to a solid below zero degrees
  • To store an item of food in a cold place
  • To make someone to not want to communicate
  • To stop moving and be still; stay the same

resolve

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US / rɪ'zɒlv /

UK / rɪˈzɑlv /

B1
  • verb
  • To make a decision to do something
  • To find an answer, solution to a problem/ question
  • To change gradually into a different form
  • To decide to try to do something
  • To change into something, other parts, etc.

scale

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US / skeɪl /

UK / skel /

A2
  • noun
  • Size, level, or amount when compared
  • Small hard plates that cover the body of fish
  • Device that is used to weigh a person or thing
  • Range of numbers from the lowest to the highest
  • Dimensions or size of something
  • verb
  • To change the size of but keep the proportions
  • To climb something large (e.g. a mountain)
  • To remove the scales of a fish

support

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US / səˈpɔ:t /

UK / səˈpɔrt, -ˈport /

A1
  • noun
  • Assistance or advice given to someone
  • Evidence that helps prove something is true
  • A thing to hold up or prevent from falling down
  • verb
  • To give assistance or advice to someone
  • To help prove or show that something is true
  • To hold up or prevent from falling down

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

prevent

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US / prɪ'vent /

UK / prɪˈvɛnt /

A2
  • verb
  • To stop something from happening or existing

same

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US / seɪm /

UK / sem /

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

tiny

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US / 'taɪnɪ /

UK / ˈtaɪni /

A2
  • adjecitve
  • Very, very small

currently

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US / ˈkʌrəntli /

UK / ˈkʌrənt(ə)li /

A2
  • adverb
  • Happening or being in the present time

internet

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US / ˈɪn.tə.net /

UK / ˋɪntɚ͵nɛt /

A1
  • noun
  • Worldwide computer network system

scatter

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US / 'skætə(r) /

UK / ˈskætɚ /

B2
  • other
  • To place or leave things in various places
  • verb
  • To throw or move into various different directions

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

video

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US / 'vɪdɪəʊ /

UK / ˈvɪdiˌo /

A2
  • adjecitve
  • Of a moving film, with sound
  • noun
  • Recording capturing action with sound
  • verb
  • To make a moving film of, with sound

against

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US / əˈgenst /

UK / əˈɡenst /

A1
  • preposition
  • In physical contact with, as for support; next to
  • In opposition to; disagreeing with

famously

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US / ˈfeɪməsli /

UK / ˈfeməsli /

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

experience

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US / ɪk'spɪərɪəns /

UK / ɪkˈspɪriəns /

A1
  • noun
  • Thing a person has done or that happened to them
  • An event at which you learned something
  • Knowledge gained by living life, doing new things
  • verb
  • To gain knowledge by doing things

limitation

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US / ˌlɪmɪˈteɪʃn /

UK / ˌlɪmɪˈteʃən /

B1
  • noun
  • Act of controlling or reducing the size of

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

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

operate

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US / ˈɒpəreɪt /

UK / ˈɑ:pəreɪt /

A1
  • verb
  • To control or handle something, such as a machine
  • To control or manage something such as a business
  • To be working or being used
  • To perform surgery on someone

protein

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US / ˈprəʊti:n /

UK / ˈprəʊˌtiːn /

B1
  • noun
  • Group of molecules made from amino acids

italian

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US / ɪ'tælɪən /

UK / ɪˈtæljən /

A1
  • adjecitve
  • Concerning the culture and people of Italy
  • noun
  • Person from Italy

hover

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US / ˈhɒvə(r) /

UK / ˈhʌvər /

B2
  • verb
  • (Bird/helicopter) to fly staying in one position
  • To stay close to an area or place

not

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US / nɒt /

UK / nɑt /

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

our

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US / 'aʊə(r) /

UK / aʊr /

A1
  • determiner
  • Belonging to us

opening

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US / ˈəʊpnɪŋ /

UK / ˈoʊpnɪŋ /

A1
  • noun
  • Free job; job you can apply for
  • Action of starting something, e.g. a new business
  • verb
  • To make accessible or able to be used, e.g. road
  • To start the activities or services of a business
  • To make a space or hole appear in something
  • To move or change so that it is no longer closed
  • To start something, e.g. a new business

size

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US / saɪz /

UK / saɪz /

A1
  • noun
  • How big or small a thing is
  • Standard measurements for clothing, shoes
  • verb
  • To make something to fit a particular measurement
  • To organize or group from small to large

server

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US / 'sɜ:və(r) /

UK / ˈsɚvɚ /

A2
  • noun
  • A computer which distributes files to others
  • Person who gives food to others at a table

teeny

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US / 'ti:nɪ /

UK / ˈtini /

C2
  • adjecitve
  • Very small

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

towards

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US / tə'wɔ:dz /

UK / 'təuədz, twɔ:dz /

A1
  • preposition
  • In the direction of someone or something

away

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US / ə'weɪ /

UK / əˈwe /

A1
  • adjecitve
  • Not present
  • adverb
  • Disappear completely
  • Doing something with a lot of energy
  • Not here; far from here; in a different direction
  • To a different area, location

blood

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US / blʌd /

UK / blʌd /

A2
  • adjecitve
  • Related by birth; family
  • noun
  • Red liquid in the bodies of people and animals
  • verb
  • To be initiated into something, e.g. a secret club

blur

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US / blɜ:(r) /

UK / blɚ /

B2
  • verb
  • To make something unclear or out of focus
  • To dull the distinction between things

bummer

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US / ˈbʌmə(r) /

UK / ˈbʌmɚ /

C2
  • noun
  • Irritating or disappointing experience

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

fundamental

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US / ˌfʌndəˈmentl /

UK / ˌfʌndəˈmɛntl /

A2
  • adjecitve
  • Forming a necessary part, base, or core
  • noun
  • A basic part of something
  • (Music) the lowest note in a harmony

world

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US / wɜ:ld /

UK / wɜrld /

A1
  • noun
  • All the humans, events, activities on the earth
  • Political division due to some kind of similarity

wavelength

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US / 'weɪvleŋθ /

UK / ˈwevˌlɛŋkθ, -ˌlɛŋθ /

C1
  • noun
  • To have similar feelings
  • The size of a wave

center

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US / 'sentə /

UK / ˈsɛntɚ /

A1
  • noun
  • Community place people go health or social reasons
  • Place in the middle of something
  • Person or thing that is attracting attention
  • verb
  • To direct focus toward something

end

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US / end /

UK / ɛnd /

A1
  • noun
  • The point where a process or activity stops
  • A point that marks the limit of something; finish
  • Goal or desired result
  • The tip, edge or limit of something
  • verb
  • To be the last part of something

exist

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US / ɪɡ'zɪst /

UK / ɪɡˈzɪst /

A1
  • verb
  • To be present, alive or real

gear

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US / ɡɪə(r) /

UK / ɡɪr /

B1
  • noun
  • A speed selector connected to an engine
  • Special clothes you use for a purpose
  • Toothed wheel shifting power from engine to wheels
  • verb
  • To aim at or prepare yourself for something

sample

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US / ˈsɑ:mpl /

UK / ˈsæmpl /

A2
  • noun
  • A small quantity of something used as a taster
  • verb
  • To try (e.g. food, drink), to see if you like it

decade

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US / ˈdekeɪd /

UK / ˈdɛkˌed, dɛˈked /

B1
  • noun
  • Period of 10 years

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

location

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US / ləʊˈkeɪʃn /

UK / loʊˈkeɪʃn /

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

scientist

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US / ˈsaɪəntɪst /

UK / ˈsaɪəntɪst /

A2
  • noun
  • Person who is trained in a science

problem

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US / ˈprɒbləm /

UK / ˈprɑbləm /

A1
  • adjecitve
  • Causing trouble
  • noun
  • Something difficult to deal with or causes trouble
  • Question to show understanding of a math concept

remote

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US / rɪ'məʊt /

UK / rɪˈmot /

A2
  • adjecitve
  • Being far away from people, towns, etc.
  • (Of a possibility) being small or not likely
  • (Of time) far off; long ago; far in the future
  • Not friendly; separating yourself from others
  • noun
  • Radio device designed to operate TV, etc.

diameter

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US / daɪˈæmɪtə(r) /

UK / daɪˈæmɪtɚ /

B1
  • noun
  • Distance across the center of an object

meat

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US / mi:t /

UK / mit /

A2
  • noun
  • Flesh of a dead animal that you eat
  • Something that is important or significant

onto

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US / ˈɒntə /

UK / ˈɑnˌtu, -tə, ˈɔn- /

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

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)

datum

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US / ˈdeɪtəm /

UK / ˈdetəm, ˈdætəm, ˈdɑtəm /

B1
  • noun
  • Item of factual information

his

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US / hɪz /

UK / hɪz /

A1
  • pronoun
  • Something belonging to a male person

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

sponsor

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US / ˈspɒnsə(r) /

UK / ˈspɑ:nsə(r) /

B1
  • noun
  • Person that supports the passage of a new law
  • Person giving money for someone's education
  • verb
  • To support the passage of a new law
  • To help someone succeed by giving them money
  • To pay for an event, usually as an advertisement

store

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US / stɔ:(r) /

UK / stɔr, stor /

A2
  • noun
  • Place where things are kept for future use
  • Place where you can go to buy things
  • verb
  • To put things in a place for later use

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

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

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

century

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US / 'sentʃərɪ /

UK / ˈsɛntʃəri /

A1
  • noun
  • Period of 100 years

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

part

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US / pɑ:t /

UK / pɑ:rt /

A1
  • adjecitve
  • To some degree; half; not fully
  • noun
  • Division of a book
  • Ratio of something, e.g. 3 of gin, 1 of tonic
  • A line in a person's hair, made with a comb
  • Character an actor plays on stage, movie, or TV
  • Some, but not all of a specific thing
  • Role in causing something to happen
  • verb
  • To make a line in a person's hair, by using a comb
  • To move two things apart creating a space
  • To leave someone, or to break off a relationship

outer

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US / ˈaʊtə(r) /

UK / ˈaʊtɚ /

A1
  • adjecitve
  • Far away
  • Being farther away from the center
  • On or around something; away from the center

without

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US / wɪˈðaʊt /

UK / wɪðˈaʊt, wɪθ- /

A1
  • preposition
  • Not with; not having

could

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US / kəd /

UK / kʊd /

A1
  • other
  • Past form of 'can' to mean have ability
  • Used to ask for something politely, or to offer

complete

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US / kəm'pli:t /

UK / kəmˈplit /

A1
  • adjecitve
  • Being finished; done; achieved
  • Being as perfect and as total as could be
  • verb
  • To finish or reach the end of doing something

gold

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US / gəʊld /

UK / goʊld /

A2
  • noun
  • Soft yellow metal that is very valuable
  • Person's name
  • adjecitve
  • Dark yellow color often seen in sunsets

strand

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US / strænd /

UK / strænd /

B2
  • noun
  • Long part of a rope, someone's hair, etc.
  • A theme or topic area
  • verb
  • To cause to be stuck or trapped somewhere

kick

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US / kɪk /

UK / kɪk /

A2
  • noun
  • Feeling of enjoyment or excitement
  • verb
  • To hit or move something with the foot

merciful

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US / ˈmɜ:sɪfl /

UK / ˈmə:sɪfəl /

B1
  • adjecitve
  • Showing or giving kind instead of harsh treatment

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

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

cell

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US / sel /

UK / sɛl /

A2
  • noun
  • Smallest unit of living things in biology
  • Group of people - often from a secret organization
  • Prisoner's room in a jail
  • Shortened form of 'cellphone'

example

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US / ɪgˈzɑ:mpl /

UK / ɪɡˈzæmpəl /

A1
  • noun
  • Thing, person which represents a category

happen

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US / 'hæpən /

UK / ˈhæpən /

A1
  • verb
  • To take place or occur

microscope

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US / ˈmaɪkrəskəʊp /

UK / ˈmaɪkrəskoʊp /

B1
  • noun
  • Scientific device making small things look bigger

track

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US / træk /

UK / træk /

A2
  • noun
  • A circular course for running
  • Course or way someone takes, e.g. in education
  • Path in a field or a forest made by walkers
  • Often circular course laid out for car racing
  • One of multiple musical recordings on an album
  • Band surrounding the wheels of a tank
  • Metal lines that trains ride on
  • verb
  • To use marks to follow a wild animal
  • To move a certain way/follow a particular course
  • To record and examine the progress of something

yeah

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US / jeə /

UK / ˈjɛə, ˈjæə, jɛ- /

A1
  • exclamation
  • Another way of saying 'yes'

typical

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US / ˈtɪpɪkl /

UK / ˈtɪpɪkəl /

A2
  • adjecitve
  • Normal; usual; expected

bacteria

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US / bæk'tɪərɪə /

UK / bækˈtɪriə /

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

dead

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US / ded /

UK / dɛd /

A1
  • adjecitve
  • Not alive
  • Being bored or not interested
  • Unable to operate because electricity etc. ran out
  • Being unable to feel, physically or emotionally
  • adverb
  • Completely; absolutely

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

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

roughly

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US / ˈrʌfli /

UK / ˈrʌflɪ /

B1
  • adverb
  • Approximately; (of numbers) about; around
  • In a manner that is violent or not careful
  • In an inexact, imprecise or violent way
  • In a basic, simple manner

physician

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US / fɪˈzɪʃn /

UK / fɪˈzɪʃən /

B2
  • noun
  • A medical doctor

second

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US / 'sekənd /

UK / ˈsɛkənd /

A1
  • adjecitve
  • 2nd; the one following first
  • noun
  • Unit of time; one sixtieth of a minute
  • Short period of time that you wait for someone
  • (Do) soon
  • verb
  • To agree to support a proposal at a meeting

snapshot

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US / ˈsnæpʃɒt /

UK / ˈsnæpʃɑ:t /

B2
  • noun
  • A photograph, especially an informal one

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)

different

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US / ˈdɪfrənt /

UK / ˈdɪfrənt /

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

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

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

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

site

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US / saɪt /

UK / saɪt /

A2
  • noun
  • Place that is reserved for a particular activity
  • Location of building work
  • Location of something
  • Place where something of special interest happened
  • Website
  • verb
  • To place something in a particular position, area

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’

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

beneath

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US / bɪ'ni:θ /

UK / bɪˈniθ /

A2
  • preposition
  • Not worthy of you; not good enough for you
  • Under; In or to a lower position; below

infect

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US / ɪn'fekt /

UK / ɪnˈfɛkt /

B1
  • verb
  • To introduce a computer virus to
  • To give a disease, bacteria or virus to
  • To make people feel the same emotion you are

place

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US / pleɪs /

UK / ples /

A1
  • noun
  • Particular location, area or region
  • verb
  • To put someone in a particular type of situation
  • To put something in a certain location or position

access

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US / 'ækses /

UK / ˈæksɛs /

A2
  • noun
  • Way to enter a place, e.g. a station or stadium
  • verb
  • To be able to use or have permission to use

dna

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US / ˌdiː en ˈeɪ /

UK / ˌdiː en ˈeɪ /

B2
  • noun
  • Chemical in living cells with genetic information

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

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

locate

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US / ləʊ'keɪt /

UK / ˈloˌket,loˈket /

A2
  • verb
  • To find exactly where something is positioned
  • To put something in a new place

must

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US / məst /

UK / mʌst /

A1
  • noun
  • Something that is necessary or required
  • other
  • (Used to state that something ought to be true)
  • Used to say something is required or necessary

probe

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US / prəʊb /

UK / prob /

B1
  • noun
  • A thorough or deep examination of a problem
  • Device used to send information from outer space
  • Long medical instrument to look inside your body
  • verb
  • To carefully examine an issue by asking questions
  • To examine the inside of something using a tool

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

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

nanometre

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US / ˈnænəʊmiːtə(r) /

UK / ˈnænoʊmiːtər /

C2
  • noun
  • One billionth of a metre

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
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  • Introduction to Video Content
  • How to See Really Tiny Things Without Killing ThemIf you love watching videos of single-celled critters wriggling around under a microscope, you're not alone. But you may wonder if there's footage of even tinier biology. Well, here's an image of just that. This string of beads is actually DNA wrapped around some proteins. Looks pretty cool, right?But snapshots like these come with a dark secret. A death sentence. In order to take a picture of something this small, you have to kill the sample. And that's a bummer, because biology doesn't necessarily look or act the same when it's dead. But over the past few decades, scientists have developed a new technology that can see really tiny things without killing them.It's called atomic force microscopy, and its real-time, small-scale footage is helping scientists study some pretty important stuff, like how to treat cancer.In 1538, the Italian physician Gerolamo Fracastoro noted that if he put one of his eyeglass lenses on top of another, the object beneath him would look a lot larger. Fast forward to the end of the century, and you've got the first compound microscopes. Today, their descendants can use visible light to see things as small as 200 nanometers in size, or roughly one five-hundredth of the diameter of a human hair. That scale is perfectly fine if you're studying things like blood cells or bacteria, but if your target is a virus or molecules like DNA and proteins, you can forget about that.Below 200 nanometers, you can run up against a problem called the limit of diffraction. Light is a wave, and when waves interact with the edges of things, say, a tiny bacterium or parts of your microscope, they diffract.
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  • If you love watching videos of single-celled critters wriggling around under a microscope, you're not alone.
  • But you may wonder if there's footage of even tinier biology.
  • Well, here's an image of just that.
  • This string of beads is actually DNA wrapped around some proteins.
  • Looks pretty cool, right?
  • But snapshots like these come with a dark secret.
  • A death sentence.
  • In order to take a picture of something this small, you have to kill the sample.
  • And that's a bummer, because biology doesn't necessarily look or act the same when it's dead.
  • But over the past few decades, scientists have developed a new technology that can see really tiny things without killing them.
  • It's called atomic force microscopy, and its real-time, small-scale footage is helping scientists study some pretty important stuff, like how to treat cancer.
  • In 1538, the Italian physician Gerolamo Fracastoro noted that if he put one of his eyeglass lenses on top of another, the object beneath him would look a lot larger.
  • Fast forward to the end of the century, and you've got the first compound microscopes.
  • Today, their descendants can use visible light to see things as small as 200 nanometers in size, or roughly one five-hundredth of the diameter of a human hair.
  • That scale is perfectly fine if you're studying things like blood cells or bacteria, but if your target is a virus or molecules like DNA and proteins, you can forget about that.
  • Below 200 nanometers, you can run up against a problem called the limit of diffraction.
  • Light is a wave, and when waves interact with the edges of things, say, a tiny bacterium or parts of your microscope, they diffract.
  • They spread out and blur your image.
  • And because the shortest wavelengths of light that your typical human eye can see hover around 400 nanometers, diffraction prevents us from resolving any details smaller than half that wavelength.
  • So, on the scale of, say, a 2.5-nanometer-thick strand of DNA, diffraction turns the whole thing into a giant blurry mess.
  • And it wouldn't matter if you stacked Dr. Gerolamo's glasses up to outer space.
  • So long as you're trying to look at DNA with visible light waves, you can't unblur the image.
  • So, back in 1933, scientists decided to get around that limitation entirely, not by switching to a different wavelength of light, but to electrons.
  • Electron microscopes shoot a beam of electrons through a specimen to detect where they slam into atomic nuclei, and exactly how they scatter in the process.
  • Using this technique, researchers can see things as small as 0.1 nanometers.
  • That's 2,000 times better than traditional optical microscopes.
  • So, if you want an up-close look at, oh, say, how a novel coronavirus infects human cells, you're good to go.
  • Well, at least after you kill everything.
  • Because in order for electron microscopy to work, your sample has to conduct electricity, and it needs to be placed in a vacuum.
  • That means a specimen must be dehydrated, frozen, sliced up, and covered with something conductive, like gold.
  • Not only is it dead, all that prep work and the electricity you're pumping through these teeny tiny corpses can damage them.
  • And putting your sample through a proverbial meat grinder probably isn't the best way to figure out how fundamental biology works in the real world.
  • But luckily, in the mid-1980s, scientists developed a nanoscale microscope that was a lot more merciful.
  • The Atomic Force Microscope, or AFM, doesn't need its samples to conduct electricity, so you don't have to coat them in some conductive metal.
  • You don't have to freeze them, slice them up, or dehydrate them, either.
  • AFMs also don't have to operate in a vacuum, so they can look at samples while they're in liquid, which is where a lot of life likes to hang out.
  • Here's how they let us look at life in all of its living, gooey glory.
  • Heads up, it's kind of an I'm-not-touching-you game on atom-scale steroids.
  • The AFMs that researchers use to study live biological samples have a super tiny probe that wiggles up and down at a very specific frequency, and moves along the sample, hovering just above the surface.
  • When the tip of the probe is 10 nanometers away from the sample, it gets pulled toward the sample because of a phenomenon called Van der Waal forces, which famously allows geckos to stick to seemingly anything.
  • But when the tip gets too close, within a few tenths of a nanometer, it gets pushed away, because all of the electrons in the tip and the sample's surface really hate being too close to one another.
  • Well, as much as subatomic particles are capable of experiencing hate.
  • By tracking all of this pushing and pulling, and how those forces affect the probe's wiggling, scientists can figure out where the tip runs into any grooves or bumps.
  • That builds a 3D map of a sample down to the atomic level.
  • And if you use the right kind of probe, AFMs can do more than map.
  • They can also measure the mechanical properties of your sample, like surface friction or stiffness.
  • It turns out some cancerous cells are stiffer than their healthy counterparts, so scientists are currently investigating how to use atomic force microscopy to help diagnose cancer, which is pretty sweet.
  • But with all of its bio-scanning power, the original atomic force microscopes came with one huge flaw.
  • They needed minutes to complete a single image.
  • That's plenty of time for camera-shy proteins and viruses to scurry away, so those early pictures could have missed a lot of important details.
  • But by 2001, researchers had miniaturized the scanning machinery and made other improvements to kick AFMs into high gear.
  • Today's high-speed AFMs can show us how nanobiology works in real time.
  • I'm talking actual video, capturing up to 50 frames per second.
  • This allows scientists to film everything, from DNA strands coming together to form the double helix, to cell membranes opening up to let in foreign invaders, to proteins folding up to change what they can do in your body.
  • And there's more.
  • Atomic force microscopy doesn't just let us watch molecular processes happen live.
  • It lets us manipulate them, too.
  • For example, you can stick the molecule of a drug onto the tip of the scanning probe, use the AFM to locate the receptor you want the molecule to interact with, plop it in, and see what happens.
  • Scientists are using this technique to study how existing breast and prostate cancer drugs work to get them to do their job even better.
  • So yeah, we've come a long way since Gerolamo Fracastoro's eyeglasses.
  • But we've also come back around to creating a technology that lets us study teeny tiny things while they're still kicking.
  • And I'm off to watch some of those awesome videos now.
  • But right after I talk about our sponsor for this episode.
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