defamatory
  (a.)破壞名譽的,誹謗的
  De·fam·a·to·ry a. Containing defamation; injurious to reputation; calumnious; slanderous; as, defamatory words; defamatory writings.
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  defamatory
       adj : (used of statements) harmful and often untrue; tending to
             discredit or malign [syn: calumniatory, calumnious,
              denigrative, denigrating, denigratory, libellous,
              libelous, slanderous]