energy
en-er-gy · noun
Definitions
noun
- 1.
The strength and vitality required for sustained activity.
- 2.
Power derived from physical or chemical resources.
- 3.
(Physics) The capacity to do work.
- 4.
The intensity of expression or effort.
Forms
plural: energies
Related words
Etymology
From Late Latin energia, from Greek energeia meaning "activity, operation," from energos meaning "active, working," composed of en- meaning "in" and ergon meaning "work."