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en·er·gy

energy

 
 
pronunciation:
e nr ji
features:
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
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
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
Word History
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.
Word Explorer
conventionally associated with energy
person who studies energy
some descriptions of energy
some kinds of energy
some sources of energy
some things that produce energy
some things that require energy
some units for measuring energy
study of energy
Word Parts  About this feature
The word energy contains the following parts:
en-2, em-2 Greek prefix that means in, into, inside
synonyms:
in-1, intro-
 
erg, ergo, urg Greek root that means work
Show wordsHide wordsExample words:
-y2 Latin and Greek noun-forming suffix that means state, quality, act, or practice of