1
as in infidelity
lack of faithfulness especially to one's husband or wife
he eventually forgave his wife's unfaithfulness
Synonyms & Similar Words
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Antonyms & Near Antonyms
2
as in betrayal
the act or fact of violating the trust or confidence of another
the jaw-dropping unfaithfulness of the person she had considered her best friend was deeply hurtful
Synonyms & Similar Words
Antonyms & Near Antonyms
3
as in adultery
a sexual encounter or relationship between a married person and someone other than their spouse
there were charges of unfaithfulness on both sides
Synonyms & Similar Words
Antonyms & Near Antonyms
Example Sentences
Recent Examples of Synonyms for unfaithfulness
Noun
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These include infidelities, unspoken longings, and thorny questions of land inheritance.—
The New Yorker,
New Yorker,
2 June 2025 -
This places the blame on the victim rather than the perpetrator of infidelity.—
Mark Travers,
Forbes.com,
2 June 2025
Noun
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Financial elder abuse victims Financial elder abuse victims suffer affects to their psychological, emotional and physical well-being, such as feelings of betrayal, fear, guilt, depression and anxiety, according to the grand jury report.—
Rosalio Ahumada,
Sacbee.com,
5 June 2025
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There’s a subtle sense that taking pleasure in domesticity might be a betrayal of my values—as if nurturing children, or even enjoying something as benign as baking, plays into oppressive tropes.—
Samantha Mann,
Time,
5 June 2025
Noun
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Every look with such an irregular desire is in our Savior’s opinion a virtual adultery. . . .—
Merve Emre,
New Yorker,
16 June 2025
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The sixth commandment in Catholic teaching prohibits adultery.—
Ruth Graham,
New York Times,
22 May 2025
Noun
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That’s the treachery of this world, that’s the trap.—
Lauren Coates,
Variety,
24 May 2025
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Press play below to learn more about Wells’ treachery, and to get a sneak peek at the fugitive interacting with her latest target.—
Matt Webb Mitovich,
TVLine,
7 Apr. 2025
Noun
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Because an employee is not eligible for unemployment benefits if the person was fired for misconduct, Wisconsin doesn’t want to have to decide the legitimacy of a firing that was based on matters of religious faith and doctrine.—
Maureen Groppe,
USA Today,
6 June 2025
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Critics have accused deputy cliques of engaging in brawls and other misconduct.—
Connor Sheets,
Los Angeles Times,
6 June 2025
Noun
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Lee’s campaign has asserted that a sitting president cannot be criminally prosecuted, except in cases of treason.—
Jong Eun Lee,
The Conversation,
29 May 2025
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The cost of failure would have been death on the grounds of treason.—
Daniel Twining,
National Review,
22 May 2025
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Cite this Entry
“Unfaithfulness.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/unfaithfulness. Accessed 20 Jun. 2025.
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