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
He was impeached in 2023 on bribery charges by the Texas House and was more recently accused of infidelity by his wife.
—
Brandi D. Addison, USA Today, 26 May 2026
When men publicly fail through addiction, infidelity, financial collapse or reckless behavior there can be room for complexity.
—Maia Niguel Hoskin, Forbes.com, 22 May 2026
The last season of the beloved sitcom had thrown fans for a loop, from Dan Conner's infidelity to the family's post-lottery win lifestyle.
—Angela Andaloro, PEOPLE, 21 May 2026
In 1672, Antonia Bembo – then living in the back part of a house known as Cà Bembo in the neighborhood of Santa Maria Nova – sued for divorce, citing Lorenzo’s infidelity along with mental and physical abuse.
—Claire Fontijn, The Conversation, 18 May 2026
See All Example Sentences for infidelity
Brandi D. Addison, USA Today, 26 May 2026
When men publicly fail through addiction, infidelity, financial collapse or reckless behavior there can be room for complexity.
—Maia Niguel Hoskin, Forbes.com, 22 May 2026
The last season of the beloved sitcom had thrown fans for a loop, from Dan Conner's infidelity to the family's post-lottery win lifestyle.
—Angela Andaloro, PEOPLE, 21 May 2026
In 1672, Antonia Bembo – then living in the back part of a house known as Cà Bembo in the neighborhood of Santa Maria Nova – sued for divorce, citing Lorenzo’s infidelity along with mental and physical abuse.
—Claire Fontijn, The Conversation, 18 May 2026
See All Example Sentences for infidelity
Recent Examples of Synonyms for infidelity
Noun
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His wife filed for divorce in 2025 after accusing him of adultery.—
NBC news,
NBC news,
31 May 2026
-
That same day, the then-Prince Charles had confessed his adultery on television.—
Diego Parrado,
Vanity Fair,
30 May 2026
Noun
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But the mayor ought to answer why, in light of this seeming betrayal, businesses still should feel confident discussing sensitive matters with him.—
The Editorial Board,
Chicago Tribune,
4 June 2026
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From church pulpits to community gatherings, the policy U-turn was widely viewed as a betrayal of Black American shoppers who launched boycotts.—
Jessica Guynn,
USA Today,
3 June 2026
Noun
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She was also convicted of first-degree official misconduct, failure to comply with an order from the Secretary of State and violation of duty − all misdemeanor charges.—
Natalie Neysa Alund,
USA Today,
1 June 2026
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And while not every improper payment reflects criminal misconduct, the magnitude of questionable spending points to deep structural weaknesses in how the program is administered.—
Sally Pipes,
Forbes.com,
1 June 2026
Noun
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Upon learning of Ava’s treachery, Deborah HOWLS.—
Jessica M. Goldstein,
Vulture,
1 May 2026
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Inflamed by Ratansen’s adviser’s account of Padmavati’s beauty, Alauddin Khalji storms the fortress by treachery rather than valor.—
Encyclopedia Britannica,
Encyclopedia Britannica,
9 Apr. 2026
Noun
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Some companies initially prohibited candidates from using AI during tests to prevent cheating.—
Lisa Eadicicco,
CNN Money,
28 May 2026
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In-person classes can still maintain some degree of rigor, and cheating can be reduced to zero as long as all assignments are done in the classroom.—
Jay Caspian Kang,
New Yorker,
26 May 2026
Noun
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Avital was generating support for her husband, who had been arrested a year before and charged with treason, and other Soviet dissidents.—
Michael Arkush,
Twin Cities,
26 May 2026
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Over the past year, a group of lawyers recorded 486 state treason and espionage cases brought against Russian scientists, bureaucrats, military figures, and other government employees.—
Anna Nemtsova,
Time,
23 May 2026
Cite this Entry
“Infidelity.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/infidelity. Accessed 6 Jun. 2026.
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