improper
Cross references: 1. indecorous im.prop.er \(')im-'pra:p-*r\ aj [MF impropre, fr. L improprius, fr. in- + proprius prop]er : not proper : as : not accordant with fact or right procedure : INCORRECT {~ inference} : not regularly or normally formed or not properly so called : not suited to the circumstances, design, or end {~ medicine} : not in accord with propriety, modesty, or good manners : INDECENT {~ language} - im.prop.er.ly av