misdeed (n.)

Old English misdæd (West Saxon), misded (Anglian, Kentish) "a wicked action, evil deed, sin," a common Germanic compound (compare Old Saxon misdad, Old Frisian misdede, Middle Dutch misdaet, Old High German mistat, German Missetat, Gothic missadeþs); see mis- (1) "bad, wrong" + deed (n.). The oldest surviving English noun in mis- (1).