1
as in infidelity
lack of faithfulness especially to one's husband or wife
his wife's perfidy was a moment of uncharacteristic weakness
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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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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.
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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
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The research points to a common issue in monogamous couples: infidelity.—
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Additionally, many individuals also hesitate to date bisexual people due to unfounded fears of infidelity, forcing bisexual individuals to constantly justify their identity based on their current or past partners.—
Noun
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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.—
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Clay’s Dad, Trevor Photo: Netflix It cannot be said enough that the root of so much of this season’s strife between AD and Clay can be traced back to one man’s flagrant disregard for his marital vows, and his inexplicable decision to involve his kids in the treachery.—
Noun
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But Barbara was never cut out to be a housewife and Nick’s adultery was a devastating blow.—
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Texas law doesn't consider adultery to be a felony or misdemeanor.—
Noun
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But betrayals were happening inside their home, too.—
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For many customers, these changes represent a fundamental betrayal of what made Southwest different.—
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.—
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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.—
Noun
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Henry’s five resolutions rejected the crown’s right to unilaterally tax the American Colonies; his speech defending the resolves was so fiery that some in the audience accused him of treason.—
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The original classic novel was penned by Alexandre Dumas and follows a young sailor falsely accused of treason, who, after years of imprisonment, escapes and seeks revenge against those who wronged him, ultimately becoming the wealthy Count of Monte Cristo.—
Cite this Entry
“Perfidy.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/perfidy. Accessed 9 Apr. 2025.
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