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  1. Oxford American Dictionary

    vitiate

    • IPA[ˈviSHēˌāt]

    美式

    • v.
      spoil or impair the quality or efficiency of；destroy or impair the legal validity of

    • verb: vitiate, 3rd person present: vitiates, gerund or present participle: vitiating, past tense: vitiated, past participle: vitiated

    • 釋義

    動詞

    • 1. formal spoil or impair the quality or efficiency of development programs have been vitiated by the rise in population
    • ▪ formal destroy or impair the legal validity of the insurance is vitiated because of foolish acts on the part of the tenant