un·mannerly I. \“+\adverb Etymology: Middle English unmanerly, from un- (I) + manerly, adverb, mannerly : in an unmannerly fashion : rudely < reformers … did not unmannerly reject those offices of the church — J.J.Blunt > II. adjective Etymology: Middle English unmanerly, from un- (I) + manerly, adjective, mannerly : not mannerly : impolite, discourteous < disliked for his unmannerly behavior >