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Webster 1913 Edition

Verb.

[1st pref.

un-

Christianize

To turn from the Christian faith; to cause to abandon the belief and profession of Christianity.

Verb.

to turn from the christian faith; to cause to degenerate from the belief and profession of christianity.

unchristianize ‎(third-person singular simple present unchristianizes, present participle unchristianizing, simple past and past participle unchristianized)