1
as in adultery
lack of faithfulness especially to one's husband or wife
infidelity can lead to divorce
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 one thing that the political boss will not forgive is infidelity
Synonyms & Similar Words
Antonyms & Near Antonyms
3
as in misconduct
a sexual encounter or relationship between a married person and someone other than their spouse
had known about his wife's infidelities for years
Synonyms & Similar Words
Antonyms & Near Antonyms
Example Sentences
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Recent Examples of infidelity
While Huerta has never spoken before about Chavez’s attacks on her, his infidelities and autocratic leadership style — and rumors of misconduct — have been documented for years.
—
Los Angeles Times, 18 Mar. 2026
All the secrets pour out, the revelations of infidelity and addiction and so on, as the group gives vent to the stuff that’s previously been unsayable—not to fix anything, mind you, since some things can’t be fixed.
—Emily Nussbaum, New Yorker, 12 Mar. 2026
These liaisons are consensual but fraught by infidelity, disparities in age and power, shifting norms.
—Judy Berman, Time, 5 Mar. 2026
In all probability, Noem’s fatal error was not infidelity, incompetence, or self-enrichment.
—Jonathan Chait, The Atlantic, 5 Mar. 2026
See All Example Sentences for infidelity
Los Angeles Times, 18 Mar. 2026
All the secrets pour out, the revelations of infidelity and addiction and so on, as the group gives vent to the stuff that’s previously been unsayable—not to fix anything, mind you, since some things can’t be fixed.
—Emily Nussbaum, New Yorker, 12 Mar. 2026
These liaisons are consensual but fraught by infidelity, disparities in age and power, shifting norms.
—Judy Berman, Time, 5 Mar. 2026
In all probability, Noem’s fatal error was not infidelity, incompetence, or self-enrichment.
—Jonathan Chait, The Atlantic, 5 Mar. 2026
See All Example Sentences for infidelity
Recent Examples of Synonyms for infidelity
Noun
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The Bible teaches that lying, stealing, adultery and coveting your neighbor’s property are sins.—
Sun Sentinel Editorial Board,
Sun Sentinel,
16 Mar. 2026
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The facile novelty of adultery is its own mask, a sexy way of dressing up a deep, frightened longing for security.—
Sara Holdren,
Vulture,
6 Mar. 2026
Noun
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Mamdani received intense backlash over the appeal from advocacy groups, who branded the flip-flop a betrayal.—
Josephine Stratman,
New York Daily News,
25 Mar. 2026
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As the consequences of that initial act spread through the household, the story develops through status, bloodline and resentment, building into a period drama centered on betrayal, ambition and the struggle for position within the family.—
Emiliano de Pablos,
Variety,
24 Mar. 2026
Noun
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According to Hartman, the board found that the evidence showed police misconduct had occurred.—
Justin Muszynski,
Hartford Courant,
23 Mar. 2026
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Van Dyke was previously charged with six counts of first-degree murder as well as and one count of official misconduct.—
Kori Rumore,
Chicago Tribune,
23 Mar. 2026
Noun
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Jonathan Cute kept probing the murky realms between tourism and treachery.—
Adam Ciralsky,
Vanity Fair,
19 Mar. 2026
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Not having to bear that burden, I was transported by Bentley and his co-writer Greg Kwedar to a Pacific Northwest of quiet beauty and matter-of-fact treachery.—
Joe Reid,
Vulture,
10 Mar. 2026
Noun
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There is no rampant cheating or election fraud in California.—
Mark Z. Barabak,
Mercury News,
26 Mar. 2026
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Research shows that artificial intelligence tools can support learning, but also has raised concerns, including students’ overreliance, cheating, and the potential degradation of critical thinking and engagement.—
Jeanne Beatrix Law,
The Conversation,
26 Mar. 2026
Noun
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For eight months they were not charged with any crime; eventually, the government falsely accused the men of treason and incitement to murder.—
Noo Saro-Wiwa,
The Dial,
24 Mar. 2026
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The president even suggested that journalists could be charged with treason.—
Ted Johnson,
Deadline,
19 Mar. 2026
Cite this Entry
“Infidelity.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/infidelity. Accessed 30 Mar. 2026.
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