Vocabulary

  • have to: Must do
  • break down: To forcibly break, destroy or make collapse
  • inside of: Within; in the inner part of.
  • to do with: To be about something; concern
  • in fact: Used to emphasize the truth of a statement, especially one that contrasts with or contradicts something else.
  • for example: As an illustration or instance.
  • based on: To use something as the foundation or starting point for something else.
  • out there: In or to a place that is far away
  • figure out: To understand the behavior of someone
  • used to: Did regularly before, but don't do now
  • with it: Intelligent, alert, and up-to-date.
  • got to: To arrive at some place
  • by now: At the present time or already; before the present.
  • think about: To consider something carefully.
  • shrink down: To become smaller in size, amount, or extent.
  • in reverse: In the opposite direction.
  • think of: To look on as (being something specific); consider
  • work on: To devote effort to improve or develop something
  • in the stars: Determined by fate or destiny.
  • in the end: Finally; after a period of time or series of events.
  • the whole story: The complete and unabridged account of something.
  • left and right: In both the left and right directions.
  • for certain: Definitely; without a doubt.
  • at once: Immediately; without delay
  • on the street: Located on or along a public road in a town or city.
  • at last: Finally; after a long delay.
  • breaks down: To forcibly break, destroy or make collapse
  • cope with: To deal successfully with a difficult situation.
  • talking about: To discuss a particular topic.
  • instead of: When one thing is replaced by another
  • from the start: From the very beginning; from the outset.
  • in a series: Arranged or happening one after another.
  • book on: A book about a particular subject.
  • by chance: Accidentally; without planning.
  • on and off: Intermittently; not continuously.
  • see in: To accompany someone to the entrance of a building or room.
  • in half: Divided into two equal parts.
  • cut in: To interrupt someone's conversation
  • in the world: Used to emphasize a question expressing surprise, confusion, or disbelief.
  • at that time: During a specific point in the past.
  • once a month: Happening or appearing one time in each month.
  • run through: To pierce with a sharp pointed object
  • in on: To be involved in a secret or plan.
  • melt into: To blend or merge smoothly into something else, often losing distinctness.
  • force in: To enter a place by applying physical force.
  • of a sudden: Quickly and unexpectedly; suddenly.
  • of course: Sure ; Certainly
  • off the ground: Having started or begun to operate or succeed.
  • fiddle with: To make small movements or adjustments to something, often nervously or restlessly.
  • in different ways: Using various methods or approaches; with variety.
  • on the verge of: Very near to doing or experiencing something.
  • up till: Until a particular time or point.
  • as soon as: In a short time after (something happens)
  • in a sense: In one way of thinking; to some extent; in some ways.
  • down the line: At a later time; in the future.
  • pay off: To give money to get person to do something; bribe
  • out of place: Not comfortable or belonging in a particular situation.
  • in terms of
  • such as: For example; like
  • by virtue of: By reason of; because of.
  • stitch together: To sew pieces of cloth or material to form one piece.
  • going on: To continue doing something
  • down to earth: Practical, realistic, and approachable.
  • right back: Said when someone says they will return soon, indicating you expect their prompt return.
  • beyond question: Without doubt; certainly; undeniably.
  • for some reason: For a reason that is not known or not easily explained.
  • look at: To use your eyes to focus on something
  • move forwards: To advance or make progress; to proceed.
  • know about: To have information or understanding of a subject or situation.
  • after all: In spite of what was expected; used to introduce a statement that supports a previous statement or explains why it was made
  • in theory: According to the stated ideas or principles
  • have at: To attack someone or something.
  • work in: To make an opening for something in your schedule
  • fly into: Suddenly become very angry or emotional.
  • as long as: For the period that; provided that.
  • fizzle out: To gradually fail or end, often after a promising start.
  • as we know it: In the form or way commonly understood or accepted.
  • in tune: Agreeing in pitch; agreeing in opinion
  • behind the scenes: Secretly or without being known to the public.
  • in detail: Thoroughly and completely; giving full particulars.
  • at first glance: Upon initial observation or assessment.
  • at random
  • on the other hand : Considering a different aspect of the matter; alternatively.
  • general: Widespread, normal or usual
  • force: Group of persons trained for military action; army
  • tiny: Very, very small
  • universe: All of space that contains planets and stars
  • extra: More than necessary; additional
  • theory: Ideas or principles that explain facts or events
  • describe: To tell the appearance, sound, smell of something
  • space: Empty area kept for a specific reason, like a car
  • string: To tie or connect things together with a thread
  • predict: To guess or estimate what will or might happen
  • gravity: (Of a situation) extreme seriousness
  • nature: Person's character or particular way of behaving
  • idea: Belief, thought, suggestion, opinion or plan
  • small: Little in size; not big
  • equation: Mathematical statement showing things to be equal
Placeholder Image

    Preparing usage notes, please check back later

  • not found vocabularyNo vocabulary matches your filters
    • after all

      US /ˈæftɚ ɔl/

      UK /ˈɑ:ftə ɔ:l/

      • Adverb
      • In spite of what was expected; used to introduce a statement that supports a previous statement or explains why it was made
      • Considering everything; used to indicate that something is happening or is true despite some difficulty or obstacle
      • Phrase
      • Despite what was expected or thought; in spite of everything.
      • Taking everything into consideration; considering that.
      B1
      More
    • as long as

      US /æz lɔŋ æz/

      UK /æz lɔŋ æz/

      • Conjunction
      • For the period that; provided that.
      • For the length of time that
      • Preposition
      • On the condition that; providing that.
      • Having the same length as.
      A1
      More
    • as soon as

      US /æz sun æz/

      UK /æz su:n æz/

      • Phrase
      • In a short time after (something happens)
      • Without any delay; immediately
      • Conjunction
      • At the moment that, or immediately after.
      A1
      More
    • as we know it

      US /əz wi no ɪt/

      UK /əz wi nəu ɪt/

      • other
      • In the form or way commonly understood or accepted.
      B2
      More
    • at first glance

      US /æt fɚst ɡlæns/

      UK /æt fə:st ɡlɑ:ns/

      • Phrase
      • Upon initial observation or assessment.
      A1
      More
    • at last

      US /æt læst/

      UK /æt lɑ:st/

      • Adverb
      • Finally; after a long delay.
      B1
      More
    • at once

      US /æt wʌns/

      UK /æt wʌns/

      • Adverb
      • Immediately; without delay
      • At the same time; simultaneously
      A2
      More
    • at random

      US /æt ˈrændəm/

      UK /æt ˈrændəm/

      • Phrase
      B1
      More
    • at that time

      US /æt ðæt taɪm/

      UK /æt ðæt taim/

      • Phrase
      • During a specific point in the past.
      A1
      More
    • based on

      US

      UK

      • Phrasal Verb
      • To use something as the foundation or starting point for something else.
      • Preposition
      • Using something as the main idea or foundation.
      • Relying on something as evidence or justification.
      A1
      More
    • behind the scenes

      US

      UK

      • Phrase
      • Secretly or without being known to the public.
      • In a position to influence events without any public knowledge.
      A1
      More
    • beyond question

      US

      UK

      • Phrase
      • Without doubt; certainly; undeniably.
      A1
      More
    • book on

      US

      UK

      • Noun
      • A book about a particular subject.
      • Verb (Transitive/Intransitive)
      • To place a bet on something.
      A1
      More
    • break down

      US /brek daʊn/

      UK /breik daun/

      • Phrasal Verb
      • To forcibly break, destroy or make collapse
      • (Machine) to stop working or become weaker
      A1
      More
    • breaks down

      US

      UK

      • Phrasal Verb
      • To forcibly break, destroy or make collapse
      • (Machine) to stop working or become weaker
      A1
      More
    • by chance

      US /baɪ tʃæns/

      UK /bai tʃɑ:ns/

      • Adverb
      • Accidentally; without planning.
      • Phrase
      • Accidentally; without planning.
      B1
      More
    • by now

      US /baɪ naʊ/

      UK /bai nau/

      • Phrase
      • At the present time or already; before the present.
      A2
      More
    • by virtue of

      US /baɪ ˈvɚtʃu ʌv/

      UK /bai ˈvə:tju: ɔv/

      • Phrase
      • By reason of; because of.
      C2
      More
    • cope with

      US /kop wɪð/

      UK /kəup wið/

      • Phrasal Verb
      • To deal successfully with a difficult situation.
      A1
      More
    • cut in

      US /kʌt ɪn/

      UK /kʌt in/

      • Phrasal Verb
      • To interrupt someone's conversation
      • To enter a queue at the wrong place
      A1
      More
    • down the line

      US /daʊn ði laɪn/

      UK /daun ðə lain/

      • Phrase
      • At a later time; in the future.
      • Completely; entirely; all the way.
      • Adjective
      • In agreement or accordance with something.
      A1
      More
    • down to earth

      US /daʊn tu ɚθ/

      UK /daun tu: ə:θ/

      • Adjective
      • Practical, realistic, and approachable.
      B1
      More
    • equation

      US /ɪˈkweʒən, -ʃən/

      UK /ɪˈkweɪʒn/

      • Noun (Countable/Uncountable)
      • Mathematical statement showing things to be equal
      • Complex set of different facts, ideas or issues
      B1
      More
    • extra

      US /'ekstrə/

      UK /'ekstrə/

      • Adjective
      • More than necessary; additional
      • Of especially good quality or grade.
      • Noun (Countable/Uncountable)
      • Items more than you need; additional items
      • Person who has a small part in a movie
      A2
      More
    • fiddle with

      US /ˈfɪdl wɪð/

      UK /ˈfidl wið/

      • Phrasal Verb
      • To make small movements or adjustments to something, often nervously or restlessly.
      • To tamper with or interfere with something, often in a way that is not authorized or skillful.
      More
    • figure out

      US /ˈfɪɡjɚ aʊt/

      UK /ˈfiɡə aut/

      • Phrasal Verb
      • To understand the behavior of someone
      • To think through logically to find a solution
      • Verb (Transitive/Intransitive)
      • To understand or find an answer to something.
      • To find a solution to a problem or understand something.
      A1
      More
    • fizzle out

      US

      UK

      • Phrasal Verb
      • To gradually fail or end, often after a promising start.
      A1
      More
    • fly into

      US /flaɪ ˈɪntu/

      UK /flai ˈintu:/

      • other
      • Suddenly become very angry or emotional.
      • Move quickly into a place, usually by flying.
      B2
      More
    • for certain

      US /fɔr ˈsɚtn/

      UK /fɔ: ˈsə:tn/

      • Idiom
      • Definitely; without a doubt.
      • Phrase
      • Without any doubt; definitely.
      More
    • for example

      US

      UK

      • Phrase
      • As an illustration or instance.
      More
    • for some reason

      US /fɔr sʌm ˈrizən/

      UK /fɔ: sʌm ˈri:zən/

      • Phrase
      • For a reason that is not known or not easily explained.
      A1
      More
    • force in

      US /fɔrs ɪn/

      UK /fɔ:rs ɪn/

      • other
      • To enter a place by applying physical force.
      B2
      More
    • from the start

      US /frʌm ði stɑrt/

      UK /frɔm ðə stɑ:t/

      • Phrase
      • From the very beginning; from the outset.
      A1
      More
    • going on

      US /ˈɡoɪŋ ɑn/

      UK /ˈgəʊɪŋ ɔn/

      • Phrasal Verb
      • To continue doing something
      • To happen (usually negative)
      A1
      More
    • got to

      US /ɡɑt tu/

      UK /gɔt tu:/

      • Verb (Transitive/Intransitive)
      • To arrive at some place
      • To have the opportunity or permission to do something
      • Phrasal Verb
      • To appeal to the emotions of; move
      • To finally begin to start something after a delay
      A1
      More
    • gravity

      US /ˈɡrævɪti/

      UK /ˈgrævəti/

      • Uncountable Noun
      • (Of a situation) extreme seriousness
      • Force making things fall towards the ground
      B1TOEIC
      More
    • have at

      US

      UK

      • Phrasal Verb
      • To attack someone or something.
      • To begin doing something with enthusiasm.
      A1
      More
    • have to

      US /hæv tu/

      UK /ˈhæv tə/

      • Auxiliary Verb
      • Must do
      A1
      More
    • in a sense

      US /ɪn e sɛns/

      UK /in ə sens/

      • Phrase
      • In one way of thinking; to some extent; in some ways.
      B1
      More
    • in a series

      US

      UK

      • Phrase
      • Arranged or happening one after another.
      • Occurring sequentially or in a specific order.
      B1
      More
    • in detail

      US /ɪn dɪˈtel/

      UK /in ˈdi:teil/

      • Phrase
      • Thoroughly and completely; giving full particulars.
      A2
      More
    • in different ways

      US

      UK

      • Phrase
      • Using various methods or approaches; with variety.
      • In varying manners or styles; not uniformly.
      A1
      More
    • in fact

      US /ɪn fækt/

      UK /in fækt/

      • Adverb
      • Used to emphasize the truth of a statement, especially one that contrasts with or contradicts something else.
      • Used to introduce a more detailed or surprising piece of information.
      • Phrase
      • Used to emphasize the truth of a statement, especially one that is surprising or contrary to what might be expected.
      C1
      More
    • in half

      US /ɪn hæf/

      UK /in hɑ:f/

      • Adverb
      • Divided into two equal parts.
      • Partially; to some extent.
      A1
      More
    • in on

      US

      UK

      • Phrase
      • To be involved in a secret or plan.
      • To be aware of something that is secret or not generally known.
      A1
      More
    • in reverse

      US /ɪn rɪˈvɚs/

      UK /in riˈvə:s/

      • Adverb
      • In the opposite direction.
      • In the opposite order.
      • Phrase
      • Moving or operating backwards.
      • With the sequence inverted.
      B2
      More
    • in terms of

      US

      UK

      • Phrase
      • With regard to; concerning a particular aspect.
      A1
      More
    • in the end

      US /ɪn ði ɛnd/

      UK /in ðə end/

      • Phrase
      • Finally; after a period of time or series of events.
      • Ultimately; as the final result or consequence.
      A1
      More
    • in the stars

      US /ɪn ðə ˈstɑrz/

      UK /in ðə ˈstɑ:z/

      • other
      • Determined by fate or destiny.
      B2
      More
    • in the world

      US /ɪn ði wɜrld/

      UK /in ðə wɜː(r)ld/

      • Phrase
      • Used to emphasize a question expressing surprise, confusion, or disbelief.
      • Used to indicate the extent or degree of something, often in a superlative sense.
      A1
      More
    • in theory

      US /ɪn ˈθiəri/

      UK /in ˈθiəri/

      • Adverb
      • According to the stated ideas or principles
      • Phrase
      • According to the theoretical possibilities rather than actual practice.
      B2
      More
    • in tune

      US /ɪn tun/

      UK /in tju:n/

      • Phrase
      • Agreeing in pitch; agreeing in opinion
      A2
      More
    • inside of

      US /ɪnˈsaɪd ʌv/

      UK /inˈsaid ɔv/

      • Preposition
      • Within; in the inner part of.
      • Within a certain period of time.
      A1
      More
    • instead of

      US /ɪnˈstɛd ʌv/

      UK /inˈsted ɔv/

      • Preposition
      • When one thing is replaced by another
      • Adverb
      • As a substitute or alternative.
      A1
      More
    • know about

      US /noʊ əˈbaʊt/

      UK /nəʊ əˈbaut/

      • Phrasal Verb
      • To have information or understanding of a subject or situation.
      More
    • left and right

      US

      UK

      • Adverb
      • In both the left and right directions.
      • Everywhere; in all directions.
      • Noun
      • Referring to both liberal and conservative political viewpoints.
      • Two opposing options or directions.
      A1
      More
    • look at

      US /lʊk æt/

      UK /luk æt/

      • Phrasal Verb
      • To use your eyes to focus on something
      • To focus your eyes on something carefully
      A1
      More
    • melt into

      US /mɛlt ˈɪntu/

      UK /melt ˈɪntuː/

      • Phrasal Verb
      • To blend or merge smoothly into something else, often losing distinctness.
      • To disappear or become unnoticeable within a larger group or environment.
      A1
      More
    • move forwards

      US

      UK

      • Phrasal Verb
      • To advance or make progress; to proceed.
      A2
      More
    • of a sudden

      US

      UK

      • Phrase
      • Quickly and unexpectedly; suddenly.
      B2
      More
    • of course

      US /ʌv kɔː(r)s/

      UK /ɔv kɔː(r)s/

      • Adverb
      • Sure ; Certainly
      • Phrase
      • For sure; certainly
      A2
      More
    • off the ground

      US /ɔf ði ɡraʊnd/

      UK /ɔf ðə ɡraund/

      • Phrase
      • Having started or begun to operate or succeed.
      • Airborne; having left the ground.
      A1
      More
    • on and off

      US /ɑn ənd ɔf/

      UK /ɔn ænd ɔf/

      • Adverb
      • Intermittently; not continuously.
      • Adjective
      • Characterized by periods of involvement and separation.
      A1
      More
    • on the other hand

      US

      UK

      • Phrase
      • Considering a different aspect of the matter; alternatively.
      A1
      More
    • on the street

      US /ɑn ði strit/

      UK /ɔn ðə stri:t/

      • Phrase
      • Located on or along a public road in a town or city.
      • Available or circulating, especially illegally or unofficially.
      A1
      More
    • on the verge of

      US /ɑn ði vɚdʒ ʌv/

      UK /ɔn ðə və:dʒ ɔv/

      • Phrase
      • Very near to doing or experiencing something.
      A1
      More
    • once a month

      US

      UK

      • Phrase
      • Happening or appearing one time in each month.
      A1
      More
    • out of place

      US /aʊt ʌv ples/

      UK /aut ɔv pleis/

      • Adjective
      • Not comfortable or belonging in a particular situation.
      • Not in the correct or usual position; missing.
      A1
      More
    • out there

      US /aʊt ðɛr/

      UK /aut ðɛə/

      • Adverb
      • In or to a place that is far away
      • Existing in the universe
      • Adjective
      • Unconventional; strange; avant-garde
      • Existing or available.
      A1
      More
    • pay off

      US /pe ɔf/

      UK /pei ɔf/

      • Phrasal Verb
      • To give money to get person to do something; bribe
      • To give money to settle a debt
      • Transitive Verb
      • To bribe someone.
      • To pay a debt in full.
      A1
      More
    • predict

      US /prɪˈdɪkt/

      UK /prɪ'dɪkt/

      • Transitive Verb
      • To guess or estimate what will or might happen
      A2TOEIC
      More
    • right back

      US /raɪt bæk/

      UK /rait bæk/

      • Interjection
      • Said when someone says they will return soon, indicating you expect their prompt return.
      • Adverb
      • Immediately; very soon after going.
      A1
      More
    • run through

      US

      UK

      • Phrasal Verb
      • To pierce with a sharp pointed object
      • To practice or rehearse quickly, e.g. for a play
      A1
      More
    • see in

      US /si ɪn/

      UK /si: in/

      • Phrasal Verb
      • To accompany someone to the entrance of a building or room.
      A1
      More
    • shrink down

      US

      UK

      • Phrasal Verb
      • To become smaller in size, amount, or extent.
      B2
      More
    • stitch together

      US /stɪtʃ təˈɡɛðɚ/

      UK /stɪtʃ təˈɡeðə/

      • other
      • To sew pieces of cloth or material to form one piece.
      B2
      More
    • string

      US /strɪŋ/

      UK /strɪŋ/

      • Transitive Verb
      • To tie or connect things together with a thread
      • Noun (Countable/Uncountable)
      • A line of connected objects
      • Thick thread; thin rope
      A2
      More
    • such as

      US /sʌtʃ æz/

      UK /sʌtʃ æz/

      • Preposition
      • For example; like
      A1
      More
    • talking about

      US

      UK

      • Phrasal Verb
      • To discuss a particular topic.
      • To be constantly mentioning or bringing up a subject.
      A1
      More
    • the whole story

      US

      UK

      • Phrase
      • The complete and unabridged account of something.
      • The complete truth about a situation, including all the details.
      A2
      More
    • theory

      US /ˈθiəri, ˈθɪri/

      UK /ˈθiəri/

      • Noun (Countable/Uncountable)
      • Ideas or principles that explain facts or events
      • An idea or belief about something
      A2TOEIC
      More
    • think about

      US /θɪŋk əˈbaʊt/

      UK /θiŋk əˈbaut/

      • Phrasal Verb
      • To consider something carefully.
      • To remember or call to mind.
      A1
      More
    • think of

      US /θɪŋk ʌv/

      UK /θiŋk ɔv/

      • Phrasal Verb
      • To look on as (being something specific); consider
      • To consider or remember something.
      • Verb (Transitive/Intransitive)
      • To imagine or call something to mind
      A1
      More
    • tiny

      US /ˈtaɪni/

      UK /'taɪnɪ/

      • Adjective
      • Very, very small
      A2
      More
    • to do with

      US

      UK

      • Phrasal Verb
      • To be about something; concern
      A1
      More
    • universe

      US /ˈjunəˌvɚs/

      UK /ˈju:nɪvɜ:s/

      • Noun (Countable/Uncountable)
      • All of space that contains planets and stars
      • Things surrounding a person, affecting their life
      B2
      More
    • up till

      US /ʌp tɪl/

      UK /ʌp tɪl/

      • other
      • Until a particular time or point.
      A2
      More
    • used to

      US /juzd tu/

      UK /ˈju:st tə/

      • Adjective
      • Did regularly before, but don't do now
      • Auxiliary Verb
      • Have done before, but do not do now
      A1
      More
    • with it

      US /wɪð ɪt/

      UK /wið it/

      • Adjective
      • Intelligent, alert, and up-to-date.
      • Understanding and knowledgeable about current trends or information.
      A1
      More
    • work in

      US /wɚk ɪn/

      UK /wə:k in/

      • Phrasal Verb
      • To make an opening for something in your schedule
      • To fit person/thing into a schedule or sequence
      A1
      More
    • work on

      US /wɚk ɑn/

      UK /wə:k ɔn/

      • Phrasal Verb
      • To devote effort to improve or develop something
      • To try to persuade or influence someone.
      A1
      More
    Video not in English?
    Video not in English?

    Get the full experience in the app

    Learn anywhere with detailed sentence and usage analysis

    preview
    01:03

    She took a brave step forward, leaving behind her comfort zone to chase her dreams.

    Vocabulary
    • brave

      adj. Having courage

    • comfort zone

      phr. A familiar situation where one feels safe

    Explanation
    a brave step is a noun phrase, where brave is an adjective modifying the noun step, meaning "a courageous step". forward is an adverb modifying step, meaning "ahead". The whole phrase serves as the object, answering the "what" of took (verb) — she took a brave step forward.

    Get the full experience in the app

    Look up words anytime with pronunciation, part of speech, and usage

    preview

    brave

    US/brev/
    UK/breɪv/
    adj.Brave
    v.t.To bravely face
    A2 Elementary

    Get the full experience in the app

    Practice speaking anytime and get instant pronunciation feedback

    preview

    Try this speaking exercise.

    Try practicing with this sentence.

    80
    B1
    #theory#string theory#string#universe#quantum#particle

    The Elegant Universe 02

    0
    姚姚 posted on 2013/09/13
    Ever wondered how scientists are trying to unite the universe's biggest ideas? This video dives into the fascinating world of String Theory, explaining complex concepts like quantum mechanics and general relativity with historical context. You'll pick up some advanced vocabulary and gain a deeper understanding of physics' biggest mysteries!

    Learn this video on the APP!

    The VoiceTube App has more in-depth practice for videos!

    Recommended Videos

    Auto Next Video

    Footer

    Download on the App StoreGet it on Google Play

    About

    • About Us
    • Our Learning Services
    • Join Us
    • FAQ
    • Hot Tags

    Services

    • Pronunciation Challenge
    • Saved
    • Search Vocabulary
    • Blog

    Channels

    Levels

    • A1
    • A2
    • B1
    • B2
    • C1
    • C2

    Privacy˙Terms˙
    ©2026 VoiceTube Corporation. All rights reserved