Deprave. It's an interesting word. It has captured some folks, including me.

verb: deprave 

3rd person present: depraves; past tense: depraved; past participle: depraved; gerund or present participle: depraving

1: archaic :  to speak ill of :  malign

2:  to make bad :  corrupt; especially :  to corrupt morally

Origin of DEPRAVE

Middle English, from Anglo-French depraver, from Latin depravare to pervert, from de- + pravus crooked, bad

First Known Use: 14th century

Synonyms

abase, bastardize, canker, cheapen, corrupt, debauch, degrade, demean, demoralize, debase, deteriorate, lessen, pervert, poison, profane, prostitute, subvert, vitiate, warp

Antonyms

elevate, ennoble, uplift