Vocabulary

  • look at: To use your eyes to focus on something
  • lean into: To bend or move your body closer to something, often for support or to get a better view.
  • to do with: To be about something; concern
  • move around: To change position or location; to go from place to place.
  • know about: To have information or understanding of a subject or situation.
  • over time: Gradually; as time passes.
  • due to: Because of; owing to
  • fix the problem: To find a solution to a problem; to repair something that is broken.
  • in terms of
  • at rest: Not moving or being used.
  • at the same time: Simultaneously; at the identical moment.
  • same time: Occurring simultaneously or at the same point in time.
  • in the middle of: In the central part or point of something.
  • on the other hand : Considering a different aspect of the matter; alternatively.
  • going on: To continue doing something
  • with time: As time passes; eventually.
  • for one thing: Used to introduce a reason for something.
  • change over: To switch from one thing to another.
  • have to: Must do
  • in other words: Stating something in a different way, often to make it clearer or more understandable.
  • for now: Temporarily; for the present time.
  • set to: To energetically begin to do, e.g. making a fire
  • kid on: To joke or tease someone or pretend something is not true.
  • account for: To explain the cause or reason for something
  • factor in: To include something as an important element when making a decision or calculation.
  • in the end: Finally; after a period of time or series of events.
  • over to: Used to hand over to someone else to speak
  • check out
  • the good stuff: Things of high quality or the best kind.
  • episode: One separate event in a series of events
  • assume: To act in a false manner to mislead others
  • potential: Capable of happening or becoming reality
  • constant: Happening frequently or without pause
  • period: Set amount of time during which events take place
  • force: Group of persons trained for military action; army
  • position: Person's opinion or attitude about something
  • increase: To make or become larger in size or amount
  • divide: To split numbers by another number, e.g. 6 / 2 = 3
  • lean: To balance against or on something for support
  • path: Method of living leading to a particular result
  • cause: Belief, goal or organization that people support
  • comparison: Act of comparing things
  • apply: To spread a substance or liquid over a surface
  • involve: To have or be included as a part of something
  • distance: Lack of friendliness toward another person
  • mass: Religious ceremony in some Christian churches
  • equal: Same in shape, size, or number
  • counteract: To reduce the impact doing something opposite
  • span: Distance between two supports of a bridge
  • equation: Mathematical statement showing things to be equal
  • analyze: To study carefully to find out the meaning of
  • bounce: A person's energy or confidence
  • pedestrian: Unremarkable; ordinary; not special
  • energy: Physical or mental strength
  • object: Something you can see or touch, but is not alive
  • frequency: Number of repetitions of (radio or sound) wave
  • root: Emotional connection with a place, history etc.
  • velocity: Speed in a given direction
  • square: Shape with 4 equal length sides and 4 equal angles
  • lot: What happens to a person in life from chance; fate
  • kind: In a caring and helpful manner
  • promise: To say you will certainly do something
  • amplify: To increase the effect of something
  • simple: Not hard to understand or do; not complex
  • multiply: To increase in number by reproducing/having babies
  • crash: To damage an object by causing it to hit something
  • motion: Suggestion at a meeting
  • point: An item to be discussed
  • middle: Place that is halfway between two things
  • worse: Comparative of 'bad'; more bad
  • turn: To become (a particular age)
  • sway: Power or influence to control a person or group
  • equilibrium: A state of balance or harmony
  • algebra: Math using letters or symbols in place of numbers
  • marble: A hard type of stone, often used in monuments
  • resonance: Continuing to make a loud clear deep sound
  • horizontal: Concerning the horizon
  • millennium: Period of time that lasts one thousand years
  • unveil: To remove something's outer covering
  • angle: Place where two lines or surfaces meet
  • circular: Shaped like a circle or part of a circle
  • kinetic: Of or relating to movement
  • radius: Area around a certain point
  • circumference: Length around an outer boundary, e.g. a circle
  • engineering: The practical application of science to industry
  • oscillate: To keep moving back and forth many times
  • foresee: To guess that a future thing will happen; predict
  • angular: Having one or more sharp angles
  • amplitude: Breadth, width or largeness of something
  • oscillation: Movement from side to side at a steady speed
  • harmonic: Relating to harmony in music
  • theta: 8th letter of the Greek alphabet
  • pi: The ratio of the circumference to the diameter
Placeholder Image

Preparing usage notes, please check back later

  • not found vocabularyNo vocabulary matches your filters
    • account for

      US /əˈkaʊnt fɔr/

      UK /əˈkaunt fɔ:/

      • Phrasal Verb
      • To explain the cause or reason for something
      • To form a particular amount or part of something.
      • Verb (Transitive/Intransitive)
      • To supply a reason or explanation for something.
      • To form a particular amount or proportion of something.
      A1
      More
    • algebra

      US /ˈældʒəbrə/

      UK /ˈældʒɪbrə/

      • Uncountable Noun
      • Math using letters or symbols in place of numbers
      C1
      More
    • amplify

      US /ˈæmpləˌfaɪ/

      UK /'æmplɪfaɪ/

      • Transitive Verb
      • To increase the effect of something
      • To add more details to a story or something said
      B2
      More
    • amplitude

      US /ˈæmplɪtu:d/

      UK /ˈæmplɪtju:d/

      • Noun (Countable/Uncountable)
      • Breadth, width or largeness of something
      • Distance between the top and the base of a curve
      C1
      More
    • analyze

      US /ˈænəˌlaɪz/

      UK /'ænəlaɪz/

      • Transitive Verb
      • To study carefully to find out the meaning of
      B1TOEIC
      More
    • angle

      US /ˈæŋɡəl/

      UK /ˈæŋgl/

      • Noun
      • Place where two lines or surfaces meet
      B1TOEIC
      More
    • angular

      US /ˈæŋɡjəlɚ/

      UK /ˈæŋgjələ(r)/

      • Adjective
      • Having one or more sharp angles
      B2
      More
    • assume

      US /əˈsum/

      UK /ə'sju:m/

      • Transitive Verb
      • To act in a false manner to mislead others
      • To believe, based on the evidence; suppose
      A2TOEIC
      More
    • at rest

      US /æt rɛst/

      UK /æt rest/

      • Adjective
      • Not moving or being used.
      • In a state of peace, quiet, or relaxation.
      A2
      More
    • at the same time

      US

      UK

      • Phrase
      • Simultaneously; at the identical moment.
      • Nevertheless; however; used to introduce a contrasting or qualifying statement.
      A1
      More
    • bounce

      US /baʊns/

      UK /baʊns/

      • Uncountable Noun
      • A person's energy or confidence
      • Quality causing a person's hair to appear healthy
      • Intransitive Verb
      • To move around energetically, playfully
      • (Of check) to be rejected due to inadequate funds
      B1
      More
    • cause

      US /kɔz/

      UK /kɔ:z/

      • Noun
      • Belief, goal or organization that people support
      • Reason for
      • Transitive Verb
      • To make something happen; create effect or result
      A2
      More
    • change over

      US

      UK

      • Phrasal Verb
      • To switch from one thing to another.
      A2
      More
    • check out

      US /tʃɛk aʊt/

      UK /tʃek aut/

      • Phrase
      • Phrasal Verb
      • To find out information about something
      • To take books out of a library
      A1
      More
    • circular

      US /ˈsɜ:rkjələ(r)/

      UK /ˈsɜ:kjələ(r)/

      • Adjective
      • Shaped like a circle or part of a circle
      • Noun
      • Paper with news, ads, etc. sent round to people
      B2
      More
    • circumference

      US /sərˈkʌmfərəns/

      UK /səˈkʌmfərəns/

      • Noun
      • Length around an outer boundary, e.g. a circle
      C1
      More
    • comparison

      US /kəmˈpærɪsən/

      UK /kəmˈpærɪsn/

      • Noun (Countable/Uncountable)
      • Act of comparing things
      • The quality or state of being similar or alike.
      A2
      More
    • constant

      US /ˈkɑnstənt/

      UK /'kɒnstənt/

      • Adjective
      • Happening frequently or without pause
      • Remaining the same over time or not changing.
      • Noun
      • Thing that happens always or at a regular rate
      • A physical quantity that is believed to have a fixed value and is used in calculations.
      A2TOEIC
      More
    • counteract

      US /ˌkaʊntɚˈækt/

      UK /ˌkaʊntərˈækt/

      • Transitive Verb
      • To reduce the impact doing something opposite
      C1
      More
    • distance

      US /ˈdɪstəns/

      UK /'dɪstəns/

      • Uncountable Noun
      • Lack of friendliness toward another person
      • Noun (Countable/Uncountable)
      • Amount of space between two places or things
      • A point or place that is far away.
      A2
      More
    • divide

      US /dɪˈvaɪd/

      UK /dɪ'vaɪd/

      • Verb (Transitive/Intransitive)
      • To split numbers by another number, e.g. 6 / 2 = 3
      • To separate something into equal pieces
      • Noun
      • A separation or distinction.
      A2TOEIC
      More
    • due to

      US /du tu/

      UK /dju: tu:/

      • Preposition
      • Because of; owing to
      • Adjective
      • Attributable to; caused by.
      A1
      More
    • energy

      US /ˈɛnədʒi/

      UK /'enədʒɪ/

      • Noun (Countable/Uncountable)
      • Physical or mental strength
      • Enthusiasm and determination.
      A2
      More
    • engineering

      US /ˌendʒɪˈnɪrɪŋ/

      UK /ˌendʒɪˈnɪərɪŋ/

      • Uncountable Noun
      • The practical application of science to industry
      B1
      More
    • episode

      US /ˈɛpɪˌsod/

      UK /'epɪsəʊd/

      • Noun
      • One separate event in a series of events
      • Show which is part of a larger story
      B1TOEIC
      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
    • equilibrium

      US /ˌikwəˈlɪbriəm, ˌɛkwə-/

      UK /ˌi:kwɪˈlɪbriəm/

      • Noun (Countable/Uncountable)
      • A state of balance or harmony
      • Calm, quiet, undisturbed emotional state
      C2TOEIC
      More
    • factor in

      US /ˈfæktɚ ɪn/

      UK /ˈfæktə in/

      • Phrasal Verb
      • To include something as an important element when making a decision or calculation.
      B2
      More
    • fix the problem

      US

      UK

      • Transitive Verb
      • To find a solution to a problem; to repair something that is broken.
      A1
      More
    • for now

      US /fɔr naʊ/

      UK /fɔ: nau/

      • Phrase
      • Temporarily; for the present time.
      • In the short term; for the immediate future.
      A1
      More
    • for one thing

      US /fɔr wʌn θɪŋ/

      UK /fɔ: wʌn θiŋ/

      • Phrase
      • Used to introduce a reason for something.
      A1
      More
    • foresee

      US /fɔrˈsi, for-/

      UK /fɔ:'si:/

      • Transitive Verb
      • To guess that a future thing will happen; predict
      B2TOEIC
      More
    • frequency

      US /ˈfrikwənsi/

      UK /'fri:kwənsɪ/

      • Uncountable Noun
      • Number of repetitions of (radio or sound) wave
      • How often something happens
      B1TOEIC
      More
    • going on

      US /ˈɡoɪŋ ɑn/

      UK /ˈgəʊɪŋ ɔn/

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

      US /hɑrˈmɑnɪk/

      UK /hɑ:ˈmɒnɪk/

      • Adjective
      • Relating to harmony in music
      B2
      More
    • have to

      US /hæv tu/

      UK /ˈhæv tə/

      • Auxiliary Verb
      • Must do
      A1
      More
    • horizontal

      US /ˌhɔ:rəˈzɑ:ntl/

      UK /ˌhɒrɪˈzɒntl/

      • Adjective
      • Concerning the horizon
      • A level and flat position
      • Adverb
      • In a horizontal position or direction.
      B1
      More
    • in other words

      US

      UK

      • Phrase
      • Stating something in a different way, often to make it clearer or more understandable.
      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 middle of

      US

      UK

      • Phrase
      • In the central part or point of something.
      • Engaged or occupied with something.
      A2
      More
    • involve

      US /ɪnˈvɑlv/

      UK /ɪn'vɒlv/

      • Transitive Verb
      • To have or be included as a part of something
      • To cause (a person or group) to take part in an event or activity.
      A2TOEIC
      More
    • kid on

      US /kɪd ɑn/

      UK /kid ɒn/

      • other
      • To joke or tease someone or pretend something is not true.
      B2
      More
    • kinetic

      US /kɪˈnɛtɪk, kaɪ-/

      UK /kɪˈnetɪk/

      • Adjective
      • Of or relating to movement
      C1
      More
    • know about

      US /noʊ əˈbaʊt/

      UK /nəʊ əˈbaut/

      • Phrasal Verb
      • To have information or understanding of a subject or situation.
      More
    • lean

      US /lin/

      UK /li:n/

      • Verb (Transitive/Intransitive)
      • To balance against or on something for support
      • To have a tendency to do something; favor
      • Adjective
      • Having a low fat content
      • Efficient; well-designed with no waste
      A2
      More
    • lean into

      US

      UK

      • Phrasal Verb
      • To bend or move your body closer to something, often for support or to get a better view.
      • To embrace or fully engage with something, especially something difficult or challenging.
      B2
      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
    • marble

      US /ˈmɑrbəl/

      UK /'mɑ:bl/

      • Noun (Countable/Uncountable)
      • A hard type of stone, often used in monuments
      • Adjective
      • Made of or resembling marble.
      • Having a veined or swirled appearance like marble.
      B1
      More
    • mass

      US /mæs/

      UK /mæs/

      • Noun (Countable/Uncountable)
      • Religious ceremony in some Christian churches
      • Large amount or number of something
      • Transitive Verb
      • To gather people or things into a large group
      B1
      More
    • millennium

      US /məˈlɛniəm/

      UK /mɪˈleniəm/

      • Noun (Countable/Uncountable)
      • Period of time that lasts one thousand years
      • The anniversary of a thousand years.
      B2TOEIC
      More
    • motion

      US /ˈmoʃən/

      UK /'məʊʃn/

      • Noun (Countable/Uncountable)
      • Suggestion at a meeting
      • A movement; the process of moving
      • Intransitive Verb
      • To communicate by moving your head or hand
      A2
      More
    • move around

      US /muv əˈraʊnd/

      UK /mu:v əˈraund/

      • Phrasal Verb
      • To change position or location; to go from place to place.
      • Intransitive Verb
      • To spread or circulate (e.g., information, rumors).
      More
    • multiply

      US /ˈmʌltəˌplaɪ/

      UK /ˈmʌltɪplaɪ/

      • Verb (Transitive/Intransitive)
      • To increase in number by reproducing/having babies
      • To increase something by a large quantity
      B1
      More
    • object

      US /ˈɑbdʒɪkt/

      UK /'ɒbdʒɪkt/

      • Noun (Countable/Uncountable)
      • Something you can see or touch, but is not alive
      • Goal or purpose of a particular plan or activity
      • Verb (Transitive/Intransitive)
      • To disagree; to protest against an idea or plan
      • To state one's reason for disagreement
      A2TOEIC
      More
    • on the other hand

      US

      UK

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

      US

      UK

      • Intransitive Verb
      • To keep moving back and forth many times
      B2
      More
    • oscillation

      US /ˌɑsəˈleʃən/

      UK /ˌɒsɪˈleɪʃn/

      • Noun
      • Movement from side to side at a steady speed
      B2
      More
    • over time

      US /ˈovɚ taɪm/

      UK /ˈəuvə taim/

      • Phrase
      • Gradually; as time passes.
      • During a long period.
      • Adverb
      • Gradually; as time passes.
      B1
      More
    • over to

      US

      UK

      • Preposition
      • Used to hand over to someone else to speak
      • The responsibility is now yours
      More
    • path

      US /pæθ, pɑθ/

      UK /pɑ:θ/

      • Noun
      • Method of living leading to a particular result
      • Track made with stones, by walking over the ground
      A2TOEIC
      More
    • pedestrian

      US /pəˈdɛstriən/

      UK /pəˈdestriən/

      • Adjective
      • Unremarkable; ordinary; not special
      • Lacking inspiration or excitement; dull.
      • Countable Noun
      • Any person walking on a sidewalk or down a road
      B1TOEIC
      More
    • pi

      US /paɪ/

      UK /paɪ/

      • Noun
      • The ratio of the circumference to the diameter
      B2
      More
    • potential

      US /pəˈtɛnʃəl/

      UK /pəˈtenʃl/

      • Adjective
      • Capable of happening or becoming reality
      • Having or showing the capacity to develop into something in the future.
      • Uncountable Noun
      • someone's or something's ability to develop, achieve, or succeed
      A2TOEIC
      More
    • radius

      US /ˈrediəs/

      UK /ˈreɪdiəs/

      • Noun (Countable/Uncountable)
      • Area around a certain point
      • Countable Noun
      • Long bone on the thumb side of your lower arm
      • Line from the center to the edge of a circle
      B2
      More
    • resonance

      US /ˈrɛzənəns/

      UK /ˈrezənəns/

      • Noun (Countable/Uncountable)
      • Continuing to make a loud clear deep sound
      • The quality in a sound of being deep, full, and reverberating.
      C2
      More
    • root

      US /rut, rʊt/

      UK /ru:t/

      • Noun (Countable/Uncountable)
      • Emotional connection with a place, history etc.
      • The origin or starting place of something
      • Transitive Verb
      • To cause a plant to develop or grow roots
      • (Animals) to search for e.g. food in earth
      A2
      More
    • same time

      US

      UK

      • Phrase
      • Occurring simultaneously or at the same point in time.
      • At the identical time as before; recurring at a fixed hour.
      • Noun
      • An equal duration or period.
      A1
      More
    • set to

      US /sɛt tu/

      UK /set tu:/

      • Phrasal Verb
      • To energetically begin to do, e.g. making a fire
      A1
      More
    • span

      US /spæn/

      UK /spæn/

      • Noun (Countable/Uncountable)
      • Distance between two supports of a bridge
      • Period of time that something continues for
      • Verb (Transitive/Intransitive)
      • To go across a certain distance between things
      • To cover or extend over a time period
      B1TOEIC
      More
    • square

      US /skwɛr/

      UK /skweə(r)/

      • Noun (Countable/Uncountable)
      • Shape with 4 equal length sides and 4 equal angles
      • The result of multiplying Length by the width
      • Adjective
      • Being fair or honest
      • Multiply a number by itself e.g. 2x2 or 6x6
      A2TOEIC
      More
    • sway

      US /swe/

      UK /sweɪ/

      • Uncountable Noun
      • Power or influence to control a person or group
      • Action of moving slowly from side to side
      • Verb (Transitive/Intransitive)
      • To change your opinion or position often
      • To influence a person's thoughts/opinion; persuade
      B2TOEIC
      More
    • the good stuff

      US

      UK

      • Phrase
      • Things of high quality or the best kind.
      • Desirable or enjoyable things.
      B1
      More
    • theta

      US /ˈθetə, ˈθi-/

      UK /ˈθi:tə/

      • Noun
      • 8th letter of the Greek alphabet
      C1
      More
    • to do with

      US

      UK

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

      US /ʌnˈvel/

      UK /ˌʌnˈveɪl/

      • Transitive Verb
      • To remove something's outer covering
      B1TOEIC
      More
    • velocity

      US /vəˈlɑsɪti/

      UK /və'lɒsətɪ/

      • Noun (Countable/Uncountable)
      • Speed in a given direction
      • The rate of change of an object's position with respect to time; a vector quantity.
      B1
      More
    • with time

      US

      UK

      • Phrase
      • As time passes; eventually.
      • Given enough time; in the course of time.
      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
    B2US
    #CrashCourse#ball#motion#amplitude#velocity#marble

    Simple Harmonic Motion: Crash Course Physics #16

    0
    林卉婧 posted on 2026/01/10
    Ever wondered why bridges wobble or how a simple pendulum keeps swinging? This Crash Course Physics video dives into the fascinating world of Simple Harmonic Motion, explaining everything from mass on a spring to resonance. You'll pick up some awesome physics vocabulary and see how these concepts play out in the real world!

    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