vitiate

[1]	spoil , corrupt , pervert , ruin , harm , subvert , demoralize , impair , mar , demoralise , debauch , sully , corrupt , debase , profane , pervert , contaminate , deprave , misdirect , adulterate , weaken , degrade , downgrade , depreciate , diminish , depress , vulgarize , lower , reduce , undermine
[2]	debase , mar , impair , deprave , pervert , spoil , deflower , corrupt , demoralize , defile
[3]	invalidate , invalidate , void , destroy , delete , cancel , nullify , annul , revoke , void , abrogate , abolish , withdraw , quash , suppress