Phocabulary - vitiate - Synonym: blemish, blight, brutalize, contaminate, damage, debase, debauch, defile, deprave, deteriorate, devalue, harm, impair, injure, mar, pervert, pollute, prejudice, spoil, sully, taint, tarnish, violate, warp, water down, weaken - Antonym: aid, assist, help, protect, save - Photo Word of the Day to improve and enhance word memory. Beginner, intermediate, advanced words including definition, synonyms, and antonyms.