“+ adjective
Etymology: Middle English unfeithful, from un- (I) + feithful faithful
: not faithful:
a. : having no religious faith : infidel
b.
(1) : not observing or adhering to vows, allegiance, or duty : disloyal
an unfaithful servant
(2) : failing to perform a function or duty
defects … make him unfaithful to his work — Samuel Alexander
c. : not faithful to marriage vows
his unfaithful wife had eloped with her latest lover — Harrison Smith
d. archaic : wanting in good faith : dishonest
this unfaithful dealing with your brother — Thomas Otway
e. : inaccurate , untrustworthy
an unfaithful copy of a document