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
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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
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Antonyms & Near Antonyms
Example Sentences
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Recent Examples of infidelity
Fans were outraged when rumors of infidelity on the Irish actor’s part began to circulate.
—
Fleurine Tideman, Glamour, 23 Mar. 2026
Sullivan also accused Morgan’s wife, the journalist and author Celia Walden, of pining for infidelity in her social media posts.
—Jake Kanter, Deadline, 19 Mar. 2026
Josh apologized for marital infidelity and a pornography addiction at the time and sought treatment.
—Brie Stimson, FOXNews.com, 19 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
See All Example Sentences for infidelity
Fleurine Tideman, Glamour, 23 Mar. 2026
Sullivan also accused Morgan’s wife, the journalist and author Celia Walden, of pining for infidelity in her social media posts.
—Jake Kanter, Deadline, 19 Mar. 2026
Josh apologized for marital infidelity and a pornography addiction at the time and sought treatment.
—Brie Stimson, FOXNews.com, 19 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
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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The costs of decades of misconduct by Chicago police have grown enormous as the city settles lawsuit after lawsuit using expensive private counsel to handle most of the work.—
Chicago Tribune,
Chicago Tribune,
30 Mar. 2026
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And of course, Andrew being stripped of his titles and evicted from Royal Lodge, only to then be arrested for suspicion of misconduct in public office.—
Lizzie Lanuza,
StyleCaster,
30 Mar. 2026
Noun
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Undocumented immigrants venture from Mexico, often underestimating of the treachery of the landscape.—
Shi En Kim,
AZCentral.com,
26 Mar. 2026
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Jonathan Cute kept probing the murky realms between tourism and treachery.—
Adam Ciralsky,
Vanity Fair,
19 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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After being tricked by Scarpia, Cavaradossi is hanged for treason.—
Courtney Lewis,
Florida Times-Union,
28 Mar. 2026
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Other montage highlights and lowlights include Margo Madison being found guilty of treason and Samantha Massey being convicted of conspiracy to violate the M-7 charter.—
Sophie Brookover,
Vulture,
27 Mar. 2026
Cite this Entry
“Infidelity.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/infidelity. Accessed 2 Apr. 2026.
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