as in infidelity
lack of faithfulness especially to one's husband or wife
perfidiousness eventually led to the couple's divorce
Synonyms & Similar Words
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Antonyms & Near Antonyms
Example Sentences
Recent Examples of Synonyms for perfidiousness
Noun
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The Woods brand was badly dinged by his November 2009 car crash and infidelity scandal, but sponsors returned for the comeback story, including his 2019 Masters title.—
Kurt Badenhausen, Sportico.com, 30 Dec. 2025
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There has been rumored infidelity aimed at both parties in addition to other grievances.—
Noun
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The book presents itself as a comic take on the classic adultery novel and a send-up of a narrow, self-conscious group of downwardly mobile New Yorkers.—
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The initial batch of documents showed that Angela Paxton sought the divorce on the grounds that Ken Paxton had committed adultery, but included no additional details.—
Noun
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Power and crime spark betrayal, forcing him to choose loyalty or survival.—
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Pic follows the relentless greed of the Fairbank family and their associates who fuel betrayal and murder in the battle for succession.—
Noun
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Ever since, the president and his closest allies haven’t stopped trying to repackage the perfidy as patriotism.—
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The ignorance, the hubris, the lies, the perfidy.—
Noun
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To quit, meanwhile, would be to open themselves to charges of disloyalty or weakness or both.—
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Even after Trump’s November 2024 win, Duncan still called himself a Republican, despite the Georgia Republican Party expelling him in January for disloyalty.—
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Cite this Entry
“Perfidiousness.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/perfidiousness. Accessed 20 Jan. 2026.
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