1. To speak ill of; to depreciate; to malign; to revile. 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)
Synonym: to corrupt, vitiate, contaminate, pollute.
Origin: L. Depravare, depravatum; de- _ pravus crooked, distorted, perverse, wicked.