improper -- (not suitable or right or appropriate; "slightly improper to dine alone with a married man"; "improper medication"; "improper attire for the golf course")
improper, unconventional, unlawful -- (not conforming to legality, moral law, or social convention; "an unconventional marriage"; "improper banking practices")
improper, wrong -- (not appropriate for a purpose or occasion; "said all the wrong things")
(Sound)
