adjective

not conforming to accepted standards of morality.

unseemly and immoral behaviour

unethical,bad,morally wrong,wrongful,wicked,evil,unprincipled,unscrupulous,dishonourable,dishonest,unconscionable,iniquitous,disreputable,fraudulent,corrupt,depraved,vile,villainous,nefarious,base,unfair,underhand,devious,sinful,impure,unchaste,unvirtuous,shameless,degenerate,debauched,abandoned,dissolute,reprobate,perverted,indecent,lewd,licentious,wanton,bawdy,lustful,promiscuous,shady,low-down,dodgy,crooked,not cricket,miscreant