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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Paxton’s baggage Cornyn’s runoff strategy has leaned heavily on Paxton’s ethical and legal history — the 2023 House impeachment and ongoing scrutiny of his conduct as attorney general and allegations of infidelity in his personal life.—
Fort Worth Star-Telegram,
Fort Worth Star-Telegram,
19 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
Noun
-
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
-
But somewhere along the way, a portion of the WNBA ecosystem — fans, players and even some media members — started treating criticism as betrayal.—
Amber Harding OutKick,
FOXNews.com,
14 May 2026
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The sequel series is based on similar – and familiar – concepts of love, loyalty and betrayal, once again set in the mafia underworld.—
Jesse Whittock,
Deadline,
14 May 2026
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.—
Encyclopedia Britannica,
Encyclopedia Britannica,
14 May 2026
-
Years ago, during his first term, Trump was lamenting the perfidy of his first Attorney General, Jeff Sessions, the former Alabama senator.—
Ruth Marcus,
New Yorker,
3 Apr. 2026
Noun
-
The two have spent months attacking each other in television ads and debates, accusing one another of fraud, dishonesty, and ideological disloyalty to the MAGA movement.—
Nik Popli,
Time,
18 May 2026
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Of the six House members expelled, the first three fought for the Confederacy during the Civil War and were expelled for disloyalty.—
Kevin Freking,
Sun Sentinel,
21 Apr. 2026
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Cite this Entry
“Perfidiousness.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/perfidiousness. Accessed 22 May. 2026.
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