Unchristian
Unchristian , adjective
[Prefix un- not + Christian.]
1.
Not Christian; not converted to the Christian faith; infidel.
2.
Contrary to Christianity; not like or becoming a Christian; as, unchristian conduct.
Unchristian , transitive verb
[1st pref. un- + Christian.]
To make unchristian. [Obsolete] — South