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Word

English Vocabulary

Pick a CEFR level (A1–C2, plus C2+ for rare words beyond the CEFR scale) — A1 is the friendliest place to start — and browse its words grouped by topic: travel, food, the body, emotions, and more. Each word shows its meaning, example sentences, and US/UK pronunciation.

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All 27,899 words

C2+ is beyond the official CEFR scale: rare, specialist, and literary words kept for reference.

52 words

Physics

52 words

/ˈmæt.ɚ/ A situation, subject, or affair that is being dealt with or considered. Meaning Off Sound Off

/ˈpaʊɚ/ The ability to control or influence people and events. Meaning Off Sound Off

/foɹs/ Physical power or strength used on something. Meaning Off Sound Off

/ˈɛn.əɹ.d͡ʒi/ The strength and ability to be active without getting tired. Meaning Off Sound Off

/spiːd/ How fast something moves or happens. Meaning Off Sound Off

/ˈhiːt/ The quality of being hot; high temperature. Meaning Off Sound Off

/weɪt/ How heavy something or someone is. Meaning Off Sound Off

/ˈn(j)u.kli.ɚ/ Using the energy released when atoms are split or joined. Meaning Off Sound Off

/ˈmoʊ.ʃən/ The act or process of moving; movement. Meaning Off Sound Off

/ɪˌlɛkˈtɹɪsɪti/ The energy carried by the flow of electric charge, used to power lights, machines, and devices. Meaning Off Sound Off

/ˈtɛm.pəɹˌt͡ʃɚ/ A measure of how hot or cold something is. Meaning Off Sound Off

/ɹɪˈzɪstəns/ The act of fighting against or refusing to accept something. Meaning Off Sound Off

/ˈfɪz.ɪks/ The science that studies matter, energy, and how they affect each other. Meaning Off Sound Off

/ˈleɪzɚ/ A device that produces a narrow, powerful beam of light. Meaning Off Sound Off

/ˈvɑ.ljum/ How loud a sound is. Meaning Off Sound Off

/ˈsɝ.kɪt/ A complete path that an electric current flows around. Meaning Off Sound Off

/ˈfluɪd/ A liquid; a substance that flows. Meaning Off Sound Off

/ɹɪˈflɛkʃən/ An image seen in a mirror or shiny surface. Meaning Off Sound Off

interference C1

/ˌɪntəɹˈfɪɹɪns/ The act of getting involved in something that does not concern you. Meaning Off Sound Off

/ˈfjuːʒən/ The act of joining separate things into one, or the result of doing so. Meaning Off Sound Off

/ˌmoʊˈmɛntəm/ The driving force that keeps an idea, process, or campaign moving forward. Meaning Off Sound Off

/ˈfɹɪkʃən̩/ The rubbing of one object or surface against another. Meaning Off Sound Off

/ˈdɛn.sə.ti/ How much of something there is in a given space or area. Meaning Off Sound Off

/ˈvoʊltɪd͡ʒ/ the electric potential difference between two points, equal to energy transferred per unit electric charge and measured in volts Meaning Off Sound Off

/vaɪˈbɹeɪʃən/ A continuous shaking movement, or the act of shaking quickly back and forth. Meaning Off Sound Off

/ɹɛl.əˈtɪv.ɪ.ti/ (physics) The scientific theory that space and time are not fixed but depend on the observer's motion. Meaning Off Sound Off

/kəmˈpɹeʃ.ən/ the act of pressing or squeezing something into a smaller space Meaning Off Sound Off

/ˈmægnəˌtɪzəm/ The physical force by which magnets attract or repel iron and other materials. Meaning Off Sound Off

/tɔɹk/ a twisting force Meaning Off Sound Off

radioactivity C1

/ˌreɪdɪəʊakˈtɪvɪti/ Spontaneous emission of ionizing radiation as a consequence of a nuclear reaction, or directly from the breakdown of an unstable nucleus. Meaning Off Sound Off

/ˈfəʊtɒn/ The quantum of light and other electromagnetic energy, regarded as a discrete particle having zero rest mass, no electric charge, and an indefinitely long lifetime. It is a gauge boson. Meaning Off Sound Off

/ˈɑptɪks/ the branch of physics concerned with light, vision, and the behavior of electromagnetic radiation Meaning Off Sound Off

/ɪnˈɝ.ʃə/ a disposition to remain inactive or inert Meaning Off Sound Off

/tɹænˈzɪs.tɚ/ A small electronic part used in devices to control or boost electrical signals. Meaning Off Sound Off

/ˈbɔɪənsi/ irrepressible liveliness and good spirit Meaning Off Sound Off

thermodynamics C2

/ˌθɜː(ɹ)moʊdaɪˈnæmɪks/ The science of the conversions between heat and other forms of energy. Meaning Off Sound Off

electromagnetism C2

/ɪˌlɛk.tɹoʊˈmæɡ.nəˌtɪzm̩/ magnetism produced by an electric current Meaning Off Sound Off

/dɪˈfɹækʃən/ when light passes sharp edges or goes through narrow slits the rays are deflected and produce fringes of light and dark bands Meaning Off Sound Off

/ˈæmplɪtuːd/ the extent or magnitude of something; the range of a wave Meaning Off Sound Off

acceleration C2+

/ækˌsɛləˈreɪʃən/ the rate of increase of speed or, more generally, the act of speeding up Meaning Off Sound Off

/dɪˈspɜrʒən/ the act of scattering or the state of being spread over a wide area Meaning Off Sound Off

/ˈɛntrəpi/ a measure of disorder or of energy unavailable for work in a system Meaning Off Sound Off

/kənˈdʌkʃən/ the transmission of heat, electricity, or signals through a medium Meaning Off Sound Off

displacement C2+

/dɪsˈpleɪsmənt/ the act of moving something from its place or the resulting shift Meaning Off Sound Off

/ˈfɪʃən/ the splitting of an atomic nucleus or a cell into parts Meaning Off Sound Off

/ˈfɪzɪsɪst/ a scientist who specializes in the study of physics Meaning Off Sound Off

/rɪˈfrækʃən/ the bending of light or other waves as they pass between media Meaning Off Sound Off

/ˈrɛzənəns/ the quality of being deep, full, and reverberating; sympathetic vibration Meaning Off Sound Off

/vɪˈskɑsɪti/ a fluid's resistance to flow; thickness or stickiness Meaning Off Sound Off

/kəˈpæ.sə.tɚ/ an electrical component that stores energy in an electric field between separated conductors Meaning Off Sound Off

/kənˈvɛkʃən/ the transfer of heat through the movement of a liquid or gas Meaning Off Sound Off

to release light, heat, a smell, or another substance Phrasal verb Meaning Off Sound Off