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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Nader reportedly ended things due to suspecting Savchenko of infidelity.—
Maureen Lee Lenker,
EW.com,
8 Apr. 2025 -
Not this evil man blaming Tracy for his infidelity!—
Emma Specter,
Vogue,
28 Mar. 2025
Noun
-
Conrad excuses himself to the bathroom, while Maeve approaches Archie and calls him out on his betrayal.—
Matt Cabral,
EW.com,
30 Mar. 2025
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The first few episodes of the season, which focus on the events of Holy Week — including the Last Supper, Judas's betrayal and Jesus's arrest — premiered on Friday, and the cast is eager to see how viewers respond.—
Lizzie Hyman,
People.com,
27 Mar. 2025
Noun
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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
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In his 1991 book The Third Chimpanzee: The Evolution and Future of the Human Animal, biologist Jared Diamond claimed the adultery rate among humans was between 5% and 30%.—
ByAndrew Curry,
science.org,
6 Mar. 2025
Noun
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Because of that treachery Castor was a pure mortal, but Pollux was a half god.—
Mike Lynch,
Twin Cities,
6 Apr. 2025
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After weeks of treachery and deception, the final roundtable has been viewed, and the winner or winners for The Traitors Season 3 have been revealed.—
Armando Tinoco,
Deadline,
6 Mar. 2025
Noun
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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
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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
Noun
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Buying American now seems like an act of treason here.—
Matthew J. Friedman,
CNN Money,
1 Apr. 2025
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Wolsey died in Season 1, but not before bequeathing his showcase to Henry, who returned the favor by accusing his chief minister of treason.—
Bryan Alexander,
USA Today,
30 Mar. 2025
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Cite this Entry
“Unfaithfulness.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/unfaithfulness. Accessed 23 Apr. 2025.
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