1
as in adultery
lack of faithfulness especially to one's husband or wife
infidelity can lead to divorce
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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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Example Sentences
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Recent Examples of infidelity
Despite the milestone, it was overshadowed by growing reports of marital strain and ongoing speculation about infidelity.
—
Elle Meier,
InStyle,
13 June 2026
From Ronnie leaving his family due to infidelity and personal struggles, to their reconciliation and vow renewal in season 3, the couple have made it through tough times.
—
Francesca Gariano,
PEOPLE,
13 June 2026
At one point, Gates testified that Epstein used his infidelity to his wife Melinda Gates to try to keep their relationship intact.
—
Lauren Green,
The Washington Examiner,
10 June 2026
To maximize their chances to claim the Senate, Democrats want to keep Maine in play, and there’s no indication yet that stories about Platner’s infidelities or his tattoo of a Nazi image are destroying his candidacy.
—
Burgess Everett,
semafor.com,
10 June 2026
See All Example Sentences for infidelity
Elle Meier,
InStyle,
13 June 2026
From Ronnie leaving his family due to infidelity and personal struggles, to their reconciliation and vow renewal in season 3, the couple have made it through tough times.
—
Francesca Gariano,
PEOPLE,
13 June 2026
At one point, Gates testified that Epstein used his infidelity to his wife Melinda Gates to try to keep their relationship intact.
—
Lauren Green,
The Washington Examiner,
10 June 2026
To maximize their chances to claim the Senate, Democrats want to keep Maine in play, and there’s no indication yet that stories about Platner’s infidelities or his tattoo of a Nazi image are destroying his candidacy.
—
Burgess Everett,
semafor.com,
10 June 2026
See All Example Sentences for infidelity
Recent Examples of Synonyms for infidelity
Noun
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The filings alleged adultery as the reason behind the divorce.
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Public opinion is against adultery.
Noun
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The videos feature anthropomorphic fruits navigating absurdist romantic betrayals.
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But as the inmate and his fellow prisoners journey into the wilderness, the real threat isn’t the trek, but the betrayal and violence festering within their ranks.
Noun
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Alite faces multiple counts of extortion, corporate misconduct, loansharking and terroristic threats.
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Councilman John Alite, 63, of Englishtown, was arrested on Friday and charged with multiple counts of theft by extortion, corporate misconduct, usury and terroristic threats, according to the New Jersey Attorney General's office.
Noun
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This is not treachery but the truest and noblest affection.
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Peacock’s adventures in treachery The Traitors was the top dog, scoring five prizes including Best Competition Series and Best Host for Alan Cumming.
Noun
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Other research on high school cheating found in 2020 that 64% of 70,000 high school students across the country admitted to cheating on a test, and 58% admitted to plagiarism.
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Other research on high school cheating found in 2020 that 64% of 70,000 high school students across the country admitted to cheating on a test, and 58% admitted to plagiarism.
Noun
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For example, French Marshal Henri Petain was showered with ticker tape in 1931 and later convicted of treason for heading the Vichy government that collaborated with the Nazis during World War II.
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War complicates the domestic front, turning any dissent into treason.
Cite this Entry
“Infidelity.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/infidelity. Accessed 30 Jun. 2026.
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