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Hawaii Volcanoes | National Geographic

Video vocabulary

flank

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US / flæŋk /

UK / flæŋk /

B2
  • noun
  • Middle area on the side of an animal
  • Right or left side of a group of soldiers
  • verb
  • To be on either side of a person or thing

responsible

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US / rɪ'spɒnsəbl /

UK / rɪˈspɑnsəbəl /

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

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

earth

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US / ɜ:θ /

UK / ɚθ /

A1
  • noun
  • Wire connecting an electrical device to the ground
  • The planet we live on
  • Soil in which we grow plants

lava

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US / ˈlɑ:və /

UK / 'lɑ:və /

B2
  • noun
  • Very hot liquid rock flowing from a volcano

begin

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US / bɪ'ɡɪn /

UK / ˈbeɡɪn /

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

slope

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US / sləʊp /

UK / sloʊp /

B1
  • noun
  • Angle of a decline, e.g. where a road dips down
  • Surface on which people can ski
  • verb
  • To have one end that is not as high as the other

edifice

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US / ˈedɪfɪs /

UK / ˈɛdəfɪs /

C1
  • noun
  • A building, especially a large one

for

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US / fə(r) /

UK / fɔr,fə /

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

spend

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US / spend /

UK / spɛnd /

A2
  • verb
  • To use money to pay for something
  • To use time in order to do something
  • To use up something completely

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

vent

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US / vent /

UK / vɛnt /

B2
  • noun
  • Opening allowing exit/entry of gas, steam etc.
  • Expression of feelings often of anger
  • verb
  • To express anger or grievance loudly/with feeling

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

precede

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US / prɪ'si:d /

UK / prɪˈsid /

B1
  • verb
  • To happen or come before something
  • To go somewhere before a person/thing

lower

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US / 'ləʊə(r) /

UK / ˈlaʊɚ, laʊr /

A2
  • adjecitve
  • In a position more near the bottom
  • verb
  • To move something downward to the ground

stream

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US / stri:m /

UK / strim /

A2
  • noun
  • Classes split into ability levels
  • A small river
  • verb
  • To send a constant flow of data over the internet
  • To split classes or students into ability levels

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

start

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US / stɑ:t /

UK / stɑrt /

A1
  • noun
  • First time or place that a thing exists; beginning
  • First opportunity to achieve something, e.g. a job
  • Sudden action or movement because you are scared
  • other
  • Beginning of something in place or time
  • verb
  • To do, be or happen for the first time; begin
  • To turn something on

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

amount

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US / ə'maʊnt /

UK / əˈmaʊnt /

A1
  • noun
  • Quantity of something
  • verb
  • To add up to a certain figure

spew

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US / spju: /

UK / spju /

C1
  • verb
  • To come out or push out with force

split

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US / splɪt /

UK / splɪt /

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

active

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US / ˈæktɪv /

UK / ˈæktɪv /

A1
  • adjecitve
  • Moving around a lot or doing many things

community

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US / kə'mju:nətɪ /

UK / kəˈmjunɪti /

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

low

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US / ləʊ /

UK / lo /

A1
  • adjecitve
  • Having a small quantity, supply, or amount
  • Being unhappy or unpleasant in attitude
  • Not high; being near the ground, or bottom
  • (Of a voice, sound) being soft; quiet
  • noun
  • Situation of not having a lot of something

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)

relatively

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US / ˈrelətɪvli /

UK / ˈrɛlətɪvlɪ /

A2
  • adverb
  • In a manner comparing something to something else

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

break

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US / breɪk /

UK / brek /

A1
  • noun
  • Time you stop an activity before continuing
  • End of a relationship
  • An escape from a place such as a jail
  • (Lucky) advantage or benefit from something
  • Find a solution or answer to a problem or crime
  • Change in the weather
  • verb
  • To create a new record e.g. running the 100m dash
  • To form a crack in something
  • To burst or become damaged
  • To end a relationship
  • To escape from a place such as a jail
  • To train a wild animal e.g. a horse
  • To separate into pieces by force, or by dropping
  • To act against a law, rule, or promise
  • To become known suddenly, as in the news
  • To not do what you promised e.g. not keep promises
  • To solve a crime, or answer a problem
  • To stop functioning properly
  • To suddenly start, open or commence
  • To change in pitch suddenly, as in a voice
  • To fall on the shore, as in waves
  • To begin or change suddenly; the dawn or weather
  • To defeat by causing the person to lose their will

fahrenheit

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US / ˈfærənhaɪt /

UK / ˈfærənˌhaɪt /

B1
  • noun
  • Measurement of temperature

increase

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US / ɪn'kri:s /

UK / ɪnˈkris /

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

scientist

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US / ˈsaɪəntɪst /

UK / ˈsaɪəntɪst /

A2
  • noun
  • Person who is trained in a science

know

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US / nəʊ /

UK / noʊ /

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

foot

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US / fʊt /

UK / fʊt /

A1
  • noun
  • Base of something such as a mountain or vase
  • Length of 12 inches or about 25 cm
  • Lowest part of the leg we use to stand on

magma

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US / 'mæɡmə /

UK / 'mæɡmə /

B2
  • noun
  • Hot liquid rock from the Earth's crust

slightly

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US / ˈslaɪtli /

UK / ˈslaɪtli /

B1
  • adverb
  • Only a little

shield

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US / ʃi:ld /

UK / ʃild /

B1
  • noun
  • A family's coat of arms or insignia
  • Device used to protect from a harmful force
  • Large piece of metal, etc. carried by police, etc.
  • Large piece of metal carried for protection
  • verb
  • To cover (e.g. your face) so as to hide from
  • To cover from a dangerous or harmful force

station

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US / 'steɪʃn /

UK / ˈsteʃən /

A1
  • noun
  • Building, area, place used for a specific reason
  • A person's place in society
  • Place where you can catch a train or a bus
  • Company that broadcasts radio or TV programs
  • verb
  • (Army) to be posted to a place to perform duties
  • To put a person in a certain place or position

almost

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US / 'ɔ:lməʊst /

UK / ˈɔlˌmost, ɔlˈmost /

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

construction

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US / kən'strʌkʃn /

UK / kənˈstrʌkʃən /

A2
  • noun
  • Act of building something; thing that is built
  • Something that is made using different parts
  • The way words are organized in a sentence
  • The way something is made or structured

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

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

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

island

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US / ˈaɪlənd /

UK / ˈaɪlənd /

A1
  • noun
  • Area of land that is surrounded by water

last

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US / lɑ:st /

UK / læst /

A1
  • adjecitve
  • Most recent; the latest
  • The one before
  • adverb
  • Final; with nothing following; after all others
  • Most recent; the latest
  • determiner
  • The one at the end
  • verb
  • To remain or continue for a certain period of time

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

without

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US / wɪˈðaʊt /

UK / wɪðˈaʊt, wɪθ- /

A1
  • preposition
  • Not with; not having

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

estimate

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US / 'estɪmət /

UK / ˈɛstəˌmet /

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

meter

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US / ˈmi:tə(r) /

UK / ˈmitɚ /

A1
  • noun
  • Unit of length equal to 100 cm or about 39 inches
  • Device for measuring things e.g. gas
  • Device to put money into to rent a parking place
  • Rhythm of a poem
  • verb
  • To measure water, etc. when it has to be paid for

subtle

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US / 'sʌtl /

UK / ˈsʌtl /

B1
  • adjecitve
  • Delicate or slight so it is difficult to perceive
  • Clever or indirect but hides the true purpose

upper

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US / ˈʌpə(r) /

UK / ˈʌpɚ /

B1
  • adjecitve
  • Located above others of the same kind
  • Being the northern part of a region
  • Being closer to the source of a river
  • noun
  • Drug that improves mood or increases energy
  • Something happy or encouraging
  • Top part of a shoe, other than the flat bottom

safety

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US / ˈseɪfti /

UK / ˈsefti /

A1
  • noun
  • Device on a gun to prevent accidental shooting
  • State of being free from harm or danger

yet

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US / jet /

UK / jɛt /

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

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

inflate

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US / ɪnˈfleɪt /

UK / ɪnˈflet /

B1
  • other
  • To make a thing seem bigger/greater than it is
  • verb
  • To fill/be filled with air and make/become bigger
  • To make a thing seem bigger/greater than it is
  • To increase (e.g. a price) more than it should be

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

survey

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US / 'sɜ:veɪ /

UK / ˈsɜː(r)veɪ /

A2
  • noun
  • Broad view or general description of something
  • Act of measuring land or property to make a map
  • Set of questions used to ask people about a topic
  • verb
  • To offer a broad view or general description
  • To measure an area of land to make a map of it
  • To ask people a question about a particular topic

sensor

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US / ˈsensə(r) /

UK / ˈsɛnsɚ, -ˌsɔr /

B2
  • noun
  • Device that detects movement or physical stimuli

become

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US / bɪ'kʌm /

UK / bɪˈkʌm /

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

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

nestle

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US / ˈnesl /

UK / ˈnɛsəl /

B2
  • verb
  • To be sheltered or protected by e.g. trees, hills
  • To rest against something that is comfortable

record

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US / 'rekɔ:d /

UK / ˈrekərd /

A1
  • noun
  • Highest or most extreme level achieved
  • Round plastic disc on which music has been stored
  • History of a person's past actions or achievements
  • verb
  • To indicate a temperature, speed, etc.; register
  • To write down or say what happened
  • To put music, sounds onto a device to store it

not

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US / nɒt /

UK / nɑt /

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

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

cut

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US / kʌt /

UK / kʌt /

A1
  • noun
  • Act/instance of reducing the size or amount of
  • Small opening made using a sharp object, knife
  • A wound on someone's skin caused by a sharp object
  • verb
  • To reduce the size or amount of something
  • To use knife or scissors to divide, open surfaces

especially

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US / ɪˈspeʃəli /

UK / ɛˈspɛʃəli, ɪˈspɛʃ- /

A1
  • adverb
  • More than usual; extremely

signal

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US / 'sɪɡnəl /

UK / ˈsɪɡnəl /

A2
  • adjecitve
  • Most important or most noticeable
  • noun
  • Movement of a hand or other means to send messages
  • Act/sound that tells people to do/start something
  • Road-side lights that direct traffic to go or stop
  • Sound and light waves carrying TV and radio data
  • verb
  • To be evidence/an indication something will happen
  • To make a noise or motion to tell someone to start

rift

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US / rɪft /

UK / rɪft /

B2
  • noun
  • Opening made by splitting; a major disagreement

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

deep

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US / di:p /

UK / dip /

A1
  • adjecitve
  • Complex and important
  • Extreme or intense
  • Going far down from the surface
  • Low in pitch, as a sound
  • adverb
  • At a certain distance beneath the surface

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;

laser

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US / ˈleɪzə(r) /

UK / ˈlezɚ /

B1
  • noun
  • Strong narrow beam of high-powered light
  • Powerful beam of light used for cutting precisely

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

state

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US / steɪt /

UK / stet /

A1
  • adjecitve
  • Concerning region within a country
  • noun
  • Region within a country, with its own government
  • Situation or condition something is in
  • verb
  • To say; declare as fact

also

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US / 'ɔ:lsəʊ /

UK / ˈɔlso /

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

five

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US / faɪv /

UK / faɪv /

A1
  • number
  • 5

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

year

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US / jə: /

UK / jɪr /

A1
  • noun
  • Unit of time equal to 12 months or 365 or 366 days
  • Used to refer to the age of a person

you

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US / jʊ /

UK / ju /

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

satellite

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US / 'sætəlaɪt /

UK / ˈsætlˌaɪt /

B1
  • noun
  • Device sent into space that aids communication
  • Natural object in space that moves around another
  • Area controlled by another group or country

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

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

fountain

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US / 'faʊntən /

UK / ˈfaʊntən /

B1
  • noun
  • Structure out of which a jet of water comes

park

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US / pɑ:k /

UK / pɑ:rk /

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

earthquake

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US / ˈɜ:θkweɪk /

UK / ˈɜ:rθkweɪk /

B1
  • noun
  • Heavy shaking of the ground due to natural forces

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

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

than

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US / ðən /

UK / ðən /

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

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

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.

three

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US / θri: /

UK / θri /

A1
  • number
  • Number 3

average

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US / 'ævərɪdʒ /

UK / ˈævərɪdʒ, ˈævrɪdʒ /

A2
  • adjecitve
  • Typical or normal; usual; ordinary
  • noun
  • Total of numbers divided by the number of items
  • verb
  • To add numbers then divide by the number of items

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

magnitude

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US / ˈmægnɪtju:d /

UK / ˈmæɡnɪˌtud, -ˌtjud /

B2
  • noun
  • Number representing force of an earthquake
  • Size or importance
  • Number representing the brightness of a star

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

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

appear

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US / ə'pɪə(r) /

UK / əˈpɪr /

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

will

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US / wɪl /

UK / wɪl /

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

day

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US / deɪ /

UK / de /

A1
  • noun
  • A period of 24 hours beginning at midnight
  • The period of time when it is light outside
  • Person's name

deceive

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US / dɪ'si:v /

UK / dɪˈsiv /

B1
  • verb
  • To make someone believe something that is not true

certain

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US / ˈsə:tn /

UK / ˈsɚtn /

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

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

point

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US / pɔɪnt /

UK / pɔɪnt /

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

summit

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US / 'sʌmɪt /

UK / ˈsʌmɪt /

B1
  • noun
  • Official meeting(s) of the leaders of countries
  • Highest part or top point of a mountain

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

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

feel

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US / fi:l /

UK / fil /

A1
  • verb
  • To be aware of or experience an emotion, sensation
  • To sense through direct contact; touch

fissure

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US / ˈfɪʃə(r) /

UK / ˈfɪʃɚ /

C1
  • noun
  • Narrow opening or crack

eruption

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US / ɪ'rʌpʃn /

UK / ɪˈrʌpʃən /

B1
  • noun
  • Act of happening suddenly or begin doing
  • Process of a volcano shooting out hot rocks

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

additional

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US / əˈdɪʃənl /

UK / ə'dɪʃənl /

A2
  • adjecitve
  • Further or added

continue

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US / kən'tɪnju: /

UK / kənˈtɪnju /

A1
  • verb
  • To do something without stopping, or after pausing
  • To start doing again after a break, pause, or stop

massive

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US / ˈmæsɪv /

UK / ˈmæsɪv /

B1
  • adjecitve
  • Very big; large; too big

shallow

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US / 'ʃæləʊ /

UK / ˈʃælo /

B1
  • adjecitve
  • Not deep; short from top to bottom
  • Lacking interest in serious things; superficial

flow

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US / fləʊ /

UK / flo /

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

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

position

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US / pəˈzɪʃn /

UK / pəˈzɪʃən /

A1
  • noun
  • Person's opinion or attitude about something
  • Specific location where someone or something is
  • Where you play or your role on a sports team
  • Person's job or status level
  • Set of conditions affecting what you can (not) do
  • verb
  • To put in a particular location or direction

precisely

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US / prɪˈsaɪsli /

UK / prɪˈsaɪsli /

B1
  • adverb
  • In an exact and accurate manner
  • (Emphasizes that a statement is totally correct)

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

tool

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US / tu:l /

UK / tul /

A2
  • noun
  • Device used to make things, e.g. a hammer
  • verb
  • To provide a workshop with the right equipment

actually

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US / ˈæktʃuəli /

UK / ˈæktʃuəli /

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

ensure

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US / ɪn'ʃʊə(r) /

UK / ɛnˈʃʊr /

A2
  • verb
  • To make something sure, certain, or safe

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

four

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US / fɔ:(r) /

UK / fɔr, for /

A1
  • number
  • 4

million

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US / ˈmɪljən /

UK / ˈmɪljən /

A1
  • number
  • 1,000,000

once

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US / wʌns /

UK / wʌns /

A1
  • adverb
  • One time; one instance
  • At a time in the past
  • conjunction
  • When; as soon as

wait

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US / weɪt /

UK / wet /

A1
  • verb
  • To delay or not do something until later
  • To spend time until an expected thing happens
  • To remain in a place until a thing happens

agency

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US / 'eɪdʒənsɪ /

UK / ˈedʒənsi /

B1
  • noun
  • Business that provides some service for others

gps

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US / ˌdʒiː piː ˈes /

UK / ˌdʒiː piː ˈes /

A1
  • abbreviation
  • GPS is an acronym

probabilistic

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US / ˌprɒbəbɪˈlɪstɪk /

UK / ˌprɑ:bəbɪˈlɪstɪk /

B1
  • adjecitve
  • Concerning or based on probability

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

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

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

status

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US / 'steɪtəs /

UK / ˈstetəs, ˈstætəs /

A2
  • noun
  • Position or rank relative to others in a society
  • Legal position of a person or thing
  • Current state or position of a thing

distance

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US / 'dɪstəns /

UK / ˈdɪstəns /

A2
  • noun
  • Lack of friendliness toward another person
  • Amount of space between two places or things
  • verb
  • To make it clear that you are not involved

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

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

particular

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US / pəˈtɪkjələ(r) /

UK / pɚˈtɪkjəlɚ, pəˈtɪk- /

B2
  • adjecitve
  • One specific (one)
  • Having firm ideas about what is desirable
  • Being special or more than is typical

observe

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US / əbˈzɜ:v /

UK / əbˈzɜ:rv /

A2
  • verb
  • To celebrate a particular holiday/religious event
  • To obey or follow laws, rules, or customs
  • To watch carefully; to make a comment

think

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US / θɪŋk /

UK / θɪŋk /

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

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

from

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US / frəm /

UK / frʌm, frɑm,frəm /

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

entirely

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US / ɪnˈtaɪəli /

UK / ɪnˈtaɪərli /

A2
  • adverb
  • Wholly; completely

loa

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US / /

UK / /

A1
  • noun
  • A god in the voodoo religion of Haiti.

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

outskirt

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US / 'aʊtˌskɜ:t /

UK / ˈaʊtˌskət /

A1
  • other
  • A part of the city far removed from the center

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

national

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US / 'næʃnəl /

UK / ˈnæʃənəl, ˈnæʃnəl /

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

most

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US / məʊst /

UK / most /

A1
  • adverb
  • Very; extremely
  • Greatest possible degree
  • pronoun
  • Nearly all of something

large

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US / lɑ:dʒ /

UK / lɑ:rdʒ /

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

rod

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US / rɒd /

UK / rɑ:d /

B1
  • noun
  • Straight, thin stick or bar
  • Pole with a line and hook to catch fish with

volcano

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US / vɒlˈkeɪnəʊ /

UK / vɑ:lˈkeɪnoʊ /

B1
  • noun
  • Mountain through which hot liquid earth can erupt

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)

continuous

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US / kənˈtɪnjuəs /

UK / kənˈtɪnjuəs /

A2
  • adjecitve
  • Happening, existing, or performed without stops

crater

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US / 'kreɪtə(r) /

UK / ˈkretɚ /

B1
  • noun
  • Large hole in ground caused by heavy impact

prepare

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US / prɪˈpeə(r) /

UK / prɪˈper /

A1
  • verb
  • To make something ready for use

zone

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US / zəʊn /

UK / zoʊn /

B1
  • noun
  • Area of space designated for a particular use
  • verb
  • To divide an area for a particular reason

hazard

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US / 'hæzəd /

UK / ˈhæzəd /

B1
  • noun
  • Something that is dangerous and causes problems
  • verb
  • To try, with the risk of being wrong or losing

detect

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US / dɪˈtekt /

UK / dɪˈtɛkt /

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

spring

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US / sprɪŋ /

UK / sprɪŋ /

A1
  • noun
  • Coil of metal that lessens impact, e.g. on cars
  • Sudden jump from one place to another
  • The time when plants start growing after winter
  • Place where water flows from beneath the ground
  • verb
  • To lessen the impact of something under pressure
  • To jump into the air

two

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US / tu: /

UK / tu /

A1
  • number
  • 2

civil

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US / ˈsɪvl /

UK / ˈsɪvəl /

B1
  • adjecitve
  • Of citizens of a country; not military, criminal
  • Acting in a polite, but not truly friendly manner

square

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US / skweə(r) /

UK / skwɛr /

A2
  • adjecitve
  • Being fair or honest
  • Multiply a number by itself e.g. 2x2 or 6x6
  • noun
  • Shape with 4 equal length sides and 4 equal angles
  • The result of multiplying Length by the width
  • Open public area in the middle of the town
  • verb
  • To make something balance or be equal
  • To multiply a number by itself, e.g. 2x2 or 6x8
  • To straighten the edge to form a four-sided shape

primary

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US / 'praɪmərɪ /

UK / ˈpraɪˌmɛri, -məri /

B2
  • adjecitve
  • Most important, most basic or essential
  • Happening first; earliest
  • of or for the teaching of young children

aware

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US / əˈwɛə /

UK / əˈwɛr /

A2
  • adjecitve
  • Knowing or feeling that something exists

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

again

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US / ə'ɡen /

UK / əˈɡɛn /

A1
  • adverb
  • One more time, once more

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)

instrument

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US / 'ɪnstrəmənt /

UK / ˈɪnstrəmənt /

A2
  • noun
  • Gauge for measuring something, e.g. temperature
  • Legal document
  • Device that is used for creating music

migrate

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US / maɪˈgreɪt /

UK / ˈmaɪgreɪt /

B1
  • verb
  • To move from one country or place to live or work

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

people

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US / 'pi:pl /

UK / ˈpipəl /

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

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

week

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US / wi:k /

UK / wik /

A1
  • noun
  • Period of seven days from Sunday to Saturday

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

county

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US / ˈkaʊnti /

UK / ˈkaʊnti /

A2
  • noun
  • Administrative region within a country or a state

quiet

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US / 'kwaɪət /

UK / ˈkwaɪɪt /

A1
  • adjecitve
  • Hidden, or done in a private way
  • Not loud; making very little sound
  • verb
  • To cause to become calmer or less loud

sea

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US / /

UK / /

A1
  • noun
  • Very large group of people, similar-looking things
  • Large body of salty water with land around it

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

exceed

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US / ɪk'si:d /

UK / ɪkˈsid /

B1
  • verb
  • To be greater in number, degree than something
  • To go above or beyond a limit or rule

expand

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US / ɪk'spænd /

UK / ɪkˈspænd /

A2
  • verb
  • To make something larger in size, number, amount

depth

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US / depθ /

UK / dɛpθ /

A2
  • noun
  • Distance below a surface

great

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US / ɡreɪt /

UK / ɡret /

A1
  • adjecitve
  • Very large in size
  • Very important
  • Very good; fantastic; wonderful
  • adverb
  • Very good; better than before
  • noun
  • Successful and well-admired person

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

city

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US / 'sɪtɪ /

UK / ˈsɪti /

A1
  • noun
  • Area with many buildings, roads and people

closely

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US / 'kləʊslɪ /

UK / ˈkloslɪ /

A2
  • adverb
  • In a careful manner
  • Nearby; just next to

ground

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US / graʊnd /

UK / ɡraʊnd /

A1
  • noun
  • Connection of electrical equipment to earth
  • Place where people play particular sports
  • Solid surface of the earth that we stand on
  • verb
  • To break (coffee, etc.) into tiny bits with machine
  • To make loud jarring noise by pressing hard
  • To make sharp or smooth through friction
  • To press together with force making a sound
  • To punish someone by not allowing them to go out
  • To hit the bottom
  • (Of boat) to hit the bottom so it cannot move
  • To prevent a plane from taking off
  • To place the ball over the goal line in rugby

main

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US / meɪn /

UK / men /

A1
  • adjecitve
  • Most important; most often used

movement

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US / ˈmu:vmənt /

UK / ˈmuvmənt /

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

several

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US / ˈsevrəl /

UK / ˈsɛvərəl,ˈsɛvrəl /

A1
  • adjecitve
  • Many of
  • pronoun
  • More than two but not a large amount

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

technique

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US / tekˈni:k /

UK / tɛkˈnik /

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

their

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US / ðɛː /

UK / ðer /

A1
  • determiner
  • Belonging to them

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

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”

billion

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US / ˈbɪljən /

UK / ˈbɪljən /

A2
  • noun
  • Number 1,000,000,000

hawaii

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US / hə'wɑ:i: /

UK / hə'wɑ:i: /

A1
  • noun
  • A state in the United States in the central Pacific on the Hawaiian Islands
  • other
  • Largest and southernmost of the Hawaii islands; has several volcanic peaks

gradually

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US / ˈgrædʒuəli /

UK / ˈɡrædʒʊəlɪ /

B1
  • adverb
  • Occurring in a slow manner over a period of time

mountain

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US / 'maʊntən /

UK / ˈmaʊntən /

A1
  • noun
  • Very high piece of land, higher than a hill

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

sleep

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US / sli:p /

UK / slip /

A1
  • noun
  • Substance in a person's eyes after waking up
  • Period of time during which a person is asleep
  • verb
  • To have enough beds for
  • To rest your body in bed, as at night time

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

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

inundation

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US / ˌɪnʌn'deɪʃn /

UK / ˌɪnʌn'deɪʃn /

C2
  • noun
  • Flooding; floods

erupt

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US / ɪˈrʌpt /

UK / ɪˈrʌpt /

B1
  • verb
  • To begin doing something or happen suddenly
  • (Volcano) to spill hot rocks, smoke, and fire

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

caldera

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US / kɒlˈdeərə /

UK / kɒlˈdɪərə /

C2
  • noun
  • Large crater caused by the explosion of a volcano

defense

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US / dɪ'fens /

UK / dɪˈfɛns /

B1
  • noun
  • Argument in support of something
  • The process of protecting something from attack
  • Part of a team that prevents others from scoring

reawaken

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US / ˌriːəˈweɪkən /

UK / ˌriːəˈweɪkən /

B2
  • verb
  • To wake up again; rediscover something new

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

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

kilometre

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US / ˈkɪləmi:tə(r) /

UK / ˈkɪləmiːtər /

A1
  • noun
  • A metric unit of length equal to 1000 metres

regular

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US / ˈregjələ(r) /

UK / ˈrɛɡjəlɚ /

A2
  • adjecitve
  • Having an equal amount of space or time in between
  • Occurring or being done frequently
  • Being normal, usual, or average
  • noun
  • Customers who frequently visit a place
  • Soldier who has a permanent job in the army

tabular

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US / ˈtæbjələ(r) /

UK / ˈtæbjəlɚ /

C2
  • adjecitve
  • (Of data) flat; like a table in form

update

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US / ˌʌpˈdeɪt /

UK / ʌpˈdet /

B1
  • noun
  • Addition of a current version of something
  • New information or data to make more current
  • verb
  • To download the latest version of software
  • To make more current or modern
  • Subtitles section
  • It is the largest volcano on Earth and appears relatively quiet today, however looks can be deceiving.
  • It is actually one of Earth's most active volcanoes and scientists now feel that the sleeping giant is on its way to reawakening.
  • In spring of 2002, the volcano began to inflate again very slightly.
  • In 2004, we began seeing deep earthquakes, about 40 kilometers deep.
  • So these two signals, very subtle, we think may be the beginning of magma moving into the very deep part of the volcano.
  • We're not certain and so we have to wait for additional signs to develop.
  • Scientists continue to observe Mauna Loa closely and since its last eruption in 1984, that work has gotten easier.
  • We have very new tools for measuring deformation especially.
  • We used to use surveying techniques, getting people out of the ground, shooting distances with lasers or using leveling rods.
  • Now we use continuous GPS sensors where using satellite signals beamed down to a sensor, you can very precisely measure the change in position of a particular point to know what the volcano is doing.
  • You have to have a network of several of them.
  • There are 50 GPS stations on Mauna Loa and Kīlauea.
  • Kīlauea is the more active volcano that's nestled up against Mauna Loa.
  • The movement of these instruments help scientists detect changes on the volcano's surface as the magma reservoir expands.
  • The volcano is part of Hawaii Volcanoes National Park and rises to over 13,500 feet above sea level.
  • Mauna Loa, which means long mountain, is so massive that it amounts to half the island of Hawaii.
  • It is flanked by Kīlauea, which has erupted continuously since 1983.
  • Since records began in 1843, Mauna Loa has erupted 33 times.
  • The 1984 eruption lasted three weeks.
  • It started with a fissure that split across Mauna Loa's caldera, its crater, then streamed fountains of lava that exceeded 2,000 degrees Fahrenheit.
  • Fissures broke at lower elevations and lava flowed down the slopes from these vents for days, coming within four miles of the outskirts of the island's main city, Hilo.
  • Mauna Loa's eruption spewed 220 million cubic meters of lava that covered more than 18 square miles.
  • Mauna Loa is a shield volcano made up almost entirely of a single lava-type basalt.
  • It erupts time after time and gradually builds up this huge shape.
  • Because it's an island volcano, it also has these two rift zones that cut through the flanks of the volcano like tabular bodies.
  • Magma can either come up through the summit or come out along these rift zones.
  • In the 20 years since its last eruption, the hazards have increased.
  • The USGS estimates that $2.3 billion has been spent on new construction on Mauna Loa's slopes.
  • The main hazard at Mauna Loa is lava inundation.
  • There are some communities living very close to potential vent areas without a lot of time to move away.
  • We're working with the county and state civil defense, which are the primary agencies responsible for preparing communities and ensuring their safety.
  • We provide them very regular updates about the status of the volcano, and we also are working to provide them probabilistic estimates of where the lava is going to flow once the vent area is known.
  • As for now, scientists can't be sure when the volcano will erupt.
  • Mauna Loa averages an eruption every four and a half years, so another one would seem to be imminent.
  • Before it erupts, we're likely to see new signals, a large earthquake.
  • In 1975 and 1984, the past two eruptions were preceded by a magnitude 6 earthquake.
  • We haven't seen that yet.
  • And also seismicity, which is now at depths of greater than 40 kilometers, will migrate to shallower depths, up higher in the edifice, within the upper five kilometers of the surface, and then we'll start becoming more aware that an eruption may be coming.