Deprave

De*prave" (dē*prāv"), v. t. [imp. & p. p. Depraved (-prāvd"); p. pr. & vb. n. Depraving.] [L. depravare, depravatum; de- + pravus crooked, distorted, perverse, wicked.] 1. To speak ill of; to depreciate; to malign; to revile. [Obs.]

And thou knowest, conscience, I came not to chide
Nor deprave thy person with a proud heart.
Piers Plowman.

2. To make bad or worse; to vitiate; to corrupt.

Whose pride depraves each other better part.
Spenser.

Syn. -- To corrupt; vitiate; contaminate; pollute.