Vitiate

глагол 1) портить, искажать Синоним(ы): impair, spoil 2) развращать 3) делать недействительным, лишать юридической силы

Большой англо-русский словарь

Vitiate

transitive verb (-ated; -ating) Etymology: Latin vitiatus, past participle of vitiare, from vitium fault, vice 1. to make faulty or defective; impair Example: the comic impact is vitiated by obvious haste — William Styron 2. to debase in moral or aesthetic status Example: a mind vitiated by prejudice 3. to make ineffective Example: fraud vitiates a contract Synonyms: see debasevitiation nounvitiator noun

Merriam-Webster's Collegiate Dictionary