Energize means to raise the energy level of something. If your really boring teacher suddenly starts throwing M&Ms to every student with a correct answer, he will energize the classroom.

Ever seen the Energizer Bunny––the one who "keeps going and going and going?" It's because he's energized by long-lasting batteries that he has the energy to beat that drum over and over. Someone who's feeling low on energy might be reenergized by a cat nap or a candy bar.

Definitions of energize

v cause to be alert and energetic

arouse, brace, energise, perk up, stimulate
calm, sedate, tranquilize, tranquillise, tranquillize
cause to be calm or quiet as by administering a sedative to
de-energise, de-energize
deprive of energy
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inject with libidinal energy
animate, quicken, reanimate, recreate, renovate, repair, revive, revivify, vivify
give new life or energy to
invigorate, reinvigorate
impart vigor, strength, or vitality to
animate, enliven, invigorate, liven, liven up
make lively
ginger up, jazz up, juice up, pep up
make more interesting or lively
inspirit, spirit, spirit up
infuse with spirit
Type of:
act physically on; have an effect upon

v raise to a higher energy level

energise, excite
Type of:
alter, change, modify
cause to change; make different; cause a transformation

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