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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Following the news breaking, rumors of infidelity on both sides began circulating on social media.
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The Apartment is a daring dissection of toxicity in the story of an insurance clerk (Jack Lemmon) who lets his co-workers use his apartment to support their 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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If the landing had been faked, the Soviets would have figured it out and would have loved to reveal to the world America’s perfidy.
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Years ago, during his first term, Trump was lamenting the perfidy of his first Attorney General, Jeff Sessions, the former Alabama senator.
Noun
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Treating rumors as diagnostic signals of uncertainty or weak trust, rather than disloyalty, helps leaders improve communication and align words with observable actions.
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Easley also argued constructive criticism was too often viewed as disloyalty and that many employees felt safer remaining silent than challenging decisions.
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“Perfidiousness.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/perfidiousness. Accessed 27 Jun. 2026.
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