adjective

morally corrupt; wicked.

he was a depraved lecher

corrupt,corrupted,perverted,deviant,degenerate,debased,degraded,immoral,unprincipled,reprobate,debauched,dissolute,profligate,lewd,licentious,lascivious,lecherous,lustful,prurient,obscene,indecent,libertine,sordid,wicked,sinful,vile,base,iniquitous,nefarious,criminal,vicious,brutal,warped,twisted,pervy,sick,sicko