misdemean

from WordNet (r) 3.0 (2006)

misdemean
    v 1: behave badly; "The children misbehaved all morning" [syn:
         {misbehave}, {misconduct}, {misdemean}] [ant: {behave},
         {comport}]

from The Collaborative International Dictionary of English v.0.48

Misdemean \Mis`de*mean"\, v. t.
   To behave ill; -- with a reflexive pronoun; as, to misdemean
   one's self.
   [1913 Webster]

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