Waste

dégradation

(gradual loss or decay)

dégénération

(gradual loss or decay)

gaspillage

(action of wasting, ineffective use)

stérile

(wasteland, desolate region)

terrain vague

(wasteland, desolate region)

terre en friche

(wasteland, desolate region)

dépérir

(to weaken)

détruire

(to destroy — see also devastate, lay waste)

dévaster

(to destroy — see also devastate, lay waste)

gaspiller

(to squander)

gâcher

(to squander)

perdre

(to squander)

tuer

(slang: to kill)