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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The source also claimed that there were multiple instances of infidelity.—
Jason Pham,
StyleCaster,
8 July 2025 -
Researchers set out to explore why public reactions to celebrity infidelity vary so widely.—
Mark Travers,
Forbes.com,
8 July 2025
Noun
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In the process, the land is torn apart by fierce rivals, shifting loyalties, and bloody betrayals.—
Matt Grobar,
Deadline,
14 July 2025
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This year’s cast delivered all the twists and betrayals fans expect, and also helped create something unexpected: a new kind of community event.—
Cynthia Salinas Cappellano,
CNN Money,
13 July 2025
Noun
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After Swaggart accused Gorman of adultery, Gorman hired a private investigator who followed Swaggart and took the photographs in New Orleans that ignited the scandal.—
Muri Assunção,
New York Daily News,
1 July 2025
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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
Noun
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The six-parter, to debut July 14, follows six groups of friends, and six historical cases of murder and treachery among them.—
Etan Vlessing,
HollywoodReporter,
19 June 2025
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But amid the bloodbaths and treacheries, Westeros still penciled in time for a little romance — some more compelling than others (Jon and Ygritte > Jon and Daenerys).—
Tyler Aquilina,
EW.com,
17 Apr. 2025
Noun
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His last review, which examined misconduct allegations against Russell Brand, only referenced job titles.—
Jake Kanter,
Deadline,
12 July 2025
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Sorrell exited the company in 2018 amid a probe of allegations of misconduct, and Read, who spent much of this time building new digital operations, became the company’s new leader.—
Brian Steinberg,
Variety,
10 July 2025
Noun
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Given the current political climate globally, Heads of State offers a humorous and outlandish perspective on poignant themes like foreign relations, government security breaches, and treason.—
Lynnette Nicholas,
Essence,
3 July 2025
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Denaturalization is rare but possible in cases of treason or crimes.—
Kristina Karisch,
The Hill,
19 June 2025
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Cite this Entry
“Unfaithfulness.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/unfaithfulness. Accessed 22 Jul. 2025.
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