Unchristian :: Unchristian (a.) Not Christian; not converted to the Christian faith; infidel.
Unchristian :: Unchristian (a.) Contrary to Christianity; not like or becoming a Christian; as, unchristian conduct..
Unchristianize :: Unchristianize (v. t.) To turn from the Christian faith; to cause to abandon the belief and profession of Christianity.