vi·ti·ate /ˈvɪʃiˌet/
 (vt.)使腐敗,汙染,使墮落,敗壞,使失效


 Vi·ti·ate v. t. [imp. & p. p. Vitiated p. pr. & vb. n. Vitiating.]  [Written also viciate.]
 1. To make vicious, faulty, or imperfect; to render defective; to injure the substance or qualities of; to impair; to contaminate; to spoil; as, exaggeration vitiates a style of writing; sewer gas vitiates the air.
    A will vitiated and growth out of love with the truth disposes the understanding to error and delusion.   --South.
    Without care it may be used to vitiate our minds.   --Burke.
    This undistinguishing complaisance will vitiate the taste of readers.   --Garth.
 2. To cause to fail of effect, either wholly or in part; to make void; to destroy, as the validity or binding force of an instrument or transaction; to annul; as, any undue influence exerted on a jury vitiates their verdict; fraud vitiates a contract.

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 vitiate
      v 1: corrupt morally or by intemperance or sensuality; "debauch
           the young people with wine and women"; "Socrates was
           accused of corrupting young men"; "Do school counselors
           subvert young children?"; "corrupt the morals" [syn: corrupt,
            pervert, subvert, demoralize, demoralise, debauch,
            debase, profane, deprave, misdirect]
      2: make imperfect; "nothing marred her beauty" [syn: mar, impair,
          spoil, deflower]
      3: take away the legal force of or render ineffective;
         "invalidateas a contract" [syn: invalidate, void]
         [ant: validate]