1
as in infidelity
lack of faithfulness especially to one's husband or wife
his wife's perfidy was a moment of uncharacteristic weakness
Synonyms & Similar Words
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Antonyms & Near Antonyms
2
as in treachery
the act or fact of violating the trust or confidence of another
the full cost—both in compromised intelligence and in human life—of the double agent's perfidy is not yet known
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Antonyms & Near Antonyms
Example Sentences
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Recent Examples of perfidy
Rational arguments are unlikely to either persuade those convinced of the perfidy of the green transition or allay the grievances that fuel the populist ferment in the West.
—
Edoardo Campanella, Foreign Affairs, 25 July 2024
To Netanyahu’s supporters urging restraint by Israel is an act of perfidy, rather than an instance of a president upholding his oath to protect American interests.
—Ben Krull, New York Daily News, 22 Apr. 2024
Drawing on American foreign policy circa 9/11 and the Iraq War, these pieces were huge collages of perfidies that Weinberger fashioned into a narrative of governmental misdeeds.
—Wyatt Mason, Harper's Magazine, 26 Apr. 2024
For a regime that has staked much of its credibility and political future on the war in Ukraine, Putin and his Kremlin allies need to keep the domestic focus on the perfidy of the foes next door.
—Ishaan Tharoor, Washington Post, 27 Mar. 2024
See All Example Sentences for perfidy
Edoardo Campanella, Foreign Affairs, 25 July 2024
To Netanyahu’s supporters urging restraint by Israel is an act of perfidy, rather than an instance of a president upholding his oath to protect American interests.
—Ben Krull, New York Daily News, 22 Apr. 2024
Drawing on American foreign policy circa 9/11 and the Iraq War, these pieces were huge collages of perfidies that Weinberger fashioned into a narrative of governmental misdeeds.
—Wyatt Mason, Harper's Magazine, 26 Apr. 2024
For a regime that has staked much of its credibility and political future on the war in Ukraine, Putin and his Kremlin allies need to keep the domestic focus on the perfidy of the foes next door.
—Ishaan Tharoor, Washington Post, 27 Mar. 2024
See All Example Sentences for perfidy
Recent Examples of Synonyms for perfidy
Noun
-
Nader reportedly ended things due to suspecting Savchenko of infidelity.—
Maureen Lee Lenker,
EW.com,
8 Apr. 2025
-
Not this evil man blaming Tracy for his infidelity!—
Emma Specter,
Vogue,
28 Mar. 2025
Noun
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Because of that treachery Castor was a pure mortal, but Pollux was a half god.—
Mike Lynch,
Twin Cities,
6 Apr. 2025
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After weeks of treachery and deception, the final roundtable has been viewed, and the winner or winners for The Traitors Season 3 have been revealed.—
Armando Tinoco,
Deadline,
6 Mar. 2025
Noun
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But Barbara was never cut out to be a housewife and Nick’s adultery was a devastating blow.—
Patti Callahan Henry,
People.com,
16 Mar. 2025
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Texas law doesn't consider adultery to be a felony or misdemeanor.—
Marley Malenfant,
Austin American-Statesman,
9 Dec. 2024
Noun
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But betrayals were happening inside their home, too.—
Kim Willis,
USA TODAY,
25 Mar. 2025
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For many customers, these changes represent a fundamental betrayal of what made Southwest different.—
Roger Dooley,
Forbes,
24 Mar. 2025
Noun
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Their internment was declared permissible under the Alien Enemies Act, a law that allowed the wartime detention and deportation of noncitizens of Japanese, German, and Italian ancestry without any evidence of disloyalty.—
Karen Ebel,
TIME,
17 Mar. 2025
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Similarly, alienating a President seemingly intent on smashing anything approaching dissent or disloyalty is not a risk many Washington institutions are willing to take at the moment.—
Philip Elliott,
TIME,
12 Feb. 2025
Noun
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Buying American now seems like an act of treason here.—
Matthew J. Friedman,
CNN Money,
1 Apr. 2025
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Wolsey died in Season 1, but not before bequeathing his showcase to Henry, who returned the favor by accusing his chief minister of treason.—
Bryan Alexander,
USA Today,
30 Mar. 2025
Cite this Entry
“Perfidy.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/perfidy. Accessed 13 Apr. 2025.
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