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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

2. • 釋義

   v.

   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
3. • 更多解釋

   vitiate

   • IPA[ˈvɪʃɪeɪt]

   英式

   • v.
     spoil or impair the quality or efficiency of: development programmes have been vitiated by the rise in population

   Oxford Dictionary