unlawful

contrary to or prohibited by or defiant of law; "unlawful measures"; "unlawful money"; "unlawful hunters"
contrary to or forbidden by law; "an illegitimate seizure of power"; "illicit trade"; "an outlaw strike"; "unlawful measures"
not morally right or permissible; "unlawful love"
not conforming to legality, moral law, or social convention; "an unconventional marriage"; "improper banking practices"