Source : Webster's Revised Unabridged Dictionary (1913)

Misdeed \Mis*deed"\, n. [AS. misd?d. See {Deed}, n.]
   An evil deed; a wicked action.

         Evils which our own misdeeds have wrought. --Milton.

   Syn: Misconduct; misdemeanor; fault; offense; trespass;
        transgression; crime.

Source : WordNet®

misdeed
     n : improper or wicked or immoral behavior [syn: {misbehavior},
         {misbehaviour}]