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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Huston could recognize the ways of that brood: her own renowned and eccentric family inhabited that domestic world of privilege, power, infidelity, and intrigue that became Christie’s writerly milieu.—
Erik Morse,
Vogue,
15 Apr. 2025 -
The exciting news comes after a tumultuous few months for Coi, who kicked off 2025 by announcing a child with Trippie before accusing him of infidelity.—
Mackenzie Cummings-Grady,
Billboard,
15 Apr. 2025
Noun
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The dream scenario, for many fans at least, was for Kingston and Woods’ betrayal of Big E to lead to an in-ring return for Big E, a former WWE Champion.—
Blake Oestriecher,
Forbes.com,
20 Apr. 2025
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First, of course, is the question of how Matty and Olympia will reckon with Julian's betrayal and the complicity of Howard who, in addition to being Olympia's senior, is also her ex-father-in-law.—
Randall Colburn,
EW.com,
19 Apr. 2025
Noun
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There’s adultery and cuckoldry and suspicions of adultery and cuckoldry and doubles and all the other good Cronenbergian ideas.—
Bilge Ebiri,
Vulture,
17 Apr. 2025
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Within the White Lotus, adultery abounds, couples engage in power plays, and flirtatious encounters occur among old friends and strangers alike.—
Sophie Gilbert,
The Atlantic,
8 Apr. 2025
Noun
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But the most intriguing finish—and the most on-brand level of treachery from Heyman—would be Paul stabbing both Roman and Punk in the back for Rollins.—
Alfred Konuwa,
Forbes.com,
19 Apr. 2025
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Sinners is about vampires, perpetual outsiders who desperately yearn to belong, but whose silky promises are rooted in treachery.—
Stephanie Zacharek,
Time,
18 Apr. 2025
Noun
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Court records show he was then indicted in June 2020 for misconduct in office.—
Will Carless,
USA Today,
18 Apr. 2025
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Nor is either party actually addressing the ballooning financial cost of local police forces in the U.S., nor the long-term reputational costs from police misconduct for trust in the police and government more broadly.—
Christopher S. Warshaw,
The Conversation,
18 Apr. 2025
Noun
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Sanyang spent nearly a decade in prison after being convicted of treason and fled to nearby Senegal after his release.—
Colleen Slevin,
Denver Post,
11 Apr. 2025
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Russia accused her of raising money for Ukraine’s military and convicted her of treason, sentencing her to 12 years in prison, BBC reported last year.—
Sean Neumann,
People.com,
10 Apr. 2025
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Cite this Entry
“Unfaithfulness.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/unfaithfulness. Accessed 3 May. 2025.
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