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en·er·gy
 energy
- pronunciation:
- e
n
 r
ji
- features:
- Word History, Word Explorer
| part of speech: |
noun |
| inflections: |
energies |
| definition: |
the ability to have force or power or to do work. There are many kinds of energy such as physical, electrical, nuclear, or chemical.
His construction job requires that he have a lot of energy.The power plant operated on nuclear energy.- synonyms:
- force, power
- similar words:
- strength
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| related words: |
ability, fire, might |
Energy is from energos, an ancient Greek word that means "active or working." The word "energy" was first used in the scientific sense of mechanical or electrical energy in the 1800s.
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conventionally associated with energy |
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conservation, effort, exhaustion, force, health, heart, might, pep, power, strength, vigor, youth, zip |
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person who studies energy |
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physicist |
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some descriptions of energy |
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atomic, chemical, electrical, hydroelectric, mechanical, nuclear, solar |
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some kinds of energy |
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atomic energy, electricity, nuclear energy, solar |
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some sources of energy |
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carbohydrate, chemical, coal, fire, food, fuel, gas, gasoline, light, natural gas, oil, plutonium, sun, uranium, water, wind |
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some things that produce energy |
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battery, engine, generator, windmill |
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some things that require energy |
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activity, concentration, electricity, labor, life, metabolism, play, work |
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some units for measuring energy |
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calorie, horsepower, kilowatt, watt |
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study of energy |
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physics |
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