impair Synonyms

deflower reduce weaken decrease debilitate deteriorate debase vitiate spoil injure enfeeble mar scotch shake shend subvert stunt soured sprain souring scath scar maltreat mangle marred marring mara mars mutilate pollute prejudice retard ruin sap sully tarnish desensitise desensitize destabilise destabilize undercutting bang up vandalize devaluate sabotage romper electronegative prejudicious wear away to diminish