adj.
Pronunciation: ˌ ə n- ' f ā th-f ə l
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 \ -f ə -l ē \ adverb
– un · faith · ful · ness noun