as in traitorous
not true in one's allegiance to someone or something
a perfidious campaign worker revealed the senator's strategy to his leading rival for the nomination
Synonyms & Similar Words
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Antonyms & Near Antonyms
as in infidelity
lack of faithfulness especially to one's husband or wife
perfidiousness eventually led to the couple's divorce
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Antonyms & Near Antonyms
Example Sentences
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Recent Examples of perfidious
Leon Aron, The Atlantic, 5 Dec. 2024
And in this new era of Sino-Western rivalry, the Olympics are also used by more nationalistic elements of the Chinese media as a way to portray China in a positive light against the perfidious Americans and Europeans.
—Alexander Smith, NBC News, 11 Aug. 2024
In what might sound to many Americans like a familiar tactic, Netanyahu cast his critics and not himself as a threat to the country’s security, and sought to position himself as a victim of perfidious judges and prosecutors.
—Tracy Wilkinson, Los Angeles Times, 27 Mar. 2023
But writer Rob Engalla’s perfidious hand movements were their undoing.
—Vulture, 10 Mar. 2023
See All Example Sentences for perfidious
Adjective
Since then, Putin has sought instead to rally the public to the defense of a motherland besieged by the perfidious and cunning West.
—Leon Aron, The Atlantic, 5 Dec. 2024
And in this new era of Sino-Western rivalry, the Olympics are also used by more nationalistic elements of the Chinese media as a way to portray China in a positive light against the perfidious Americans and Europeans.
—Alexander Smith, NBC News, 11 Aug. 2024
In what might sound to many Americans like a familiar tactic, Netanyahu cast his critics and not himself as a threat to the country’s security, and sought to position himself as a victim of perfidious judges and prosecutors.
—Tracy Wilkinson, Los Angeles Times, 27 Mar. 2023
But writer Rob Engalla’s perfidious hand movements were their undoing.
—Vulture, 10 Mar. 2023
See All Example Sentences for perfidious
Recent Examples of Synonyms for perfidious
Adjective
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Smith made out their former collaborators to be ungrateful and traitorous, and the kids weren't given the space to question her command.—
Zoey Lyttle,
People.com,
18 Apr. 2025
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Foreign military interventions can change victims from being viewed as a nuisance into being seen as powerful and traitorous enemies, potentially capable of exacting revenge, seizing power, or breaking away from the state.—
Benjamin A. Valentino,
Foreign Affairs,
17 Oct. 2011
Noun
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Huston could recognize the ways of that brood: her own renowned and eccentric family inhabited that domestic world of privilege, power, infidelity, and intrigue that became Christie’s writerly milieu.—
Erik Morse,
Vogue,
15 Apr. 2025
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The exciting news comes after a tumultuous few months for Coi, who kicked off 2025 by announcing a child with Trippie before accusing him of infidelity.—
Mackenzie Cummings-Grady,
Billboard,
15 Apr. 2025
Adjective
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Last year’s 17-9 start proved to be a false spring, one that lulled fans into thinking Craig Counsell replacing David Ross was the real difference between an 83-win Cubs team and the postseason.—
Paul Sullivan,
Chicago Tribune,
25 Apr. 2025
-
Environmental protection versus energy affordability is a false choice.—
Noah Ginsburg,
New York Daily News,
23 Apr. 2025
Noun
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Within the White Lotus, adultery abounds, couples engage in power plays, and flirtatious encounters occur among old friends and strangers alike.—
Sophie Gilbert,
The Atlantic,
8 Apr. 2025
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In his 1991 book The Third Chimpanzee: The Evolution and Future of the Human Animal, biologist Jared Diamond claimed the adultery rate among humans was between 5% and 30%.—
ByAndrew Curry,
science.org,
6 Mar. 2025
Noun
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The dream scenario, for many fans at least, was for Kingston and Woods’ betrayal of Big E to lead to an in-ring return for Big E, a former WWE Champion.—
Blake Oestriecher,
Forbes.com,
20 Apr. 2025
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First, of course, is the question of how Matty and Olympia will reckon with Julian's betrayal and the complicity of Howard who, in addition to being Olympia's senior, is also her ex-father-in-law.—
Randall Colburn,
EW.com,
19 Apr. 2025
Noun
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The prior month, Vice President JD Vance had lodged his own complaints about Europe’s alleged perfidy, threatening that the United States might withdraw its security guarantees from Europe if the EU continued to aggressively regulate U.S. tech companies.—
ANU BRADFORD,
Foreign Affairs,
21 Apr. 2025
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Despite high trade deficits, the U.S. economy is strong Trump and his advisers point to America’s lopsided trade numbers—year after year of huge deficits—as proof of foreigners’ perfidy.—
Time,
Time,
9 Apr. 2025
Noun
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The Game is speaking up after the controversial figure attempted to call him out for disloyalty on X/Twitter.—
Jessica Bennett,
VIBE.com,
14 Apr. 2025
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The director of the National Security Agency, Gen. Timothy Haugh, was among the numerous officials far-right activist Laura Loomer urged President Donald Trump to remove during her official Oval Office meeting earlier this week, citing evidence of disloyalties, multiple sources tell ABC News.—
Will Steakin,
ABC News,
4 Apr. 2025
Cite this Entry
“Perfidious.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/perfidious. Accessed 1 May. 2025.
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