adj
unfaithful
adj
1
Not sexually loyal to a partner; cheating.
"He was unfaithful to his wife for years before she found out."
"She promised she would never be unfaithful to him."
2
Not staying loyal to a person, cause, or duty.
"The general was accused of being unfaithful to his country."
"An unfaithful servant betrayed his master to the enemy."
3
Not accurately representing the original, especially in a translation.
"Critics called the new translation unfaithful to the original French text."
How to Use Unfaithful
Learner’s notesIn plain EnglishNot loyal, especially to a partner or a cause — or, of a translation, not true to the original.
Common pairings
unfaithful to someone
unfaithful husband/wife
unfaithful translation
Word Forms
more unfaithful comparative, most unfaithful superlative
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Etymology
From Middle English unfeithful — simply un- (\"not\") added to faithful.