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- pronunciation:
- e
n
 r
ji
- features:
- Word Combinations (noun), Word History, Word Explorer, Word Parts
| part of speech: |
noun |
| inflections: |
energies |
| definition 1: |
the power or ability to make something work or be active.
Plants use the energy of the sun to grow.Swimming fast takes a lot of energy.- synonyms:
- force, might, power
- antonyms:
- inertia
- similar words:
- activity, strength
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| definition 2: |
the amount of such power needed to do something.
He has no energy to continue the job.- synonyms:
- force, go, steam, vigor
- similar words:
- drive, effort, stamina
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| definition 3: |
eager interest; liveliness.
He spoke with energy on the subject of building a new playground for the school.- synonyms:
- pep, vigor, zip
- antonyms:
- fatigue
- similar words:
- action, activity, life, liveliness, spirit
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| related words: |
ability, fire, initiative, might, pain, zeal |
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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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