in·de·co·rous \ənˈdekərəs, (ˈ)in|d- also -krəs |ində̇|kōr-, -dē|-, -kȯr-\adjective Etymology: Latin indecorus, from in- in- (I) + decorus decorous : not decorous : not proper : conflicting with accepted standards of propriety or good taste or good breeding < an indecorous remark > < indecorous behavior > • in·dec·or·ous·lyadverb • in·dec·or·ous·nessnoun