used or expended carelessly or to no purpose

wasted fuel

a wasted opportunity

(of a person or a part of the body) weak or emaciated

her wasted arm

under the influence of alcohol or illegal drugs

he looked kind of wasted

use or expend carelessly, extravagantly, or to no purpose

we can't afford to waste electricity

I don't use the car, so why should I waste precious money on it?

(of a person or a part of the body) become progressively weaker and more emaciated

she was visibly wasting away

kill or severely injure (someone)

I saw them waste the guy I worked for

devastate or ruin (a place)

he seized their cattle and wasted their country

(of time) pass away

the years were wasting