Main Entry: un·faith·ful

Pronunciation: \ˌən-ˈfāth-fəl\

Function: adjective

Date: 15th century

: not faithful: a : not adhering to vows, allegiance, or duty : disloyal <an unfaithful friend> b : not faithful to marriage vows <suspected her husband of being unfaithful> c : inaccurate, untrustworthy <an unfaithful copy of a document>

— un·faith·ful·ly \-fə-lē\ adverb

— un·faith·ful·ness noun