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
-
Allegations of infidelity have followed Attorney General Ken Paxton while on the campaign trail.—
Eleanor Dearman,
Fort Worth Star-Telegram,
2 June 2026 -
Ruth Wilson played Alison Bailey for four seasons on The Affair, Showtime's steamy drama about marital infidelity and its surprisingly deadly consequences for two couples.—
Britt Hayes,
Entertainment Weekly,
29 May 2026
Noun
-
His wife filed for divorce in 2025 after accusing him of adultery.—
NBC news,
NBC news,
31 May 2026
-
That same day, the then-Prince Charles had confessed his adultery on television.—
Diego Parrado,
Vanity Fair,
30 May 2026
Noun
-
But the mayor ought to answer why, in light of this seeming betrayal, businesses still should feel confident discussing sensitive matters with him.—
The Editorial Board,
Chicago Tribune,
4 June 2026
-
From church pulpits to community gatherings, the policy U-turn was widely viewed as a betrayal of Black American shoppers who launched boycotts.—
Jessica Guynn,
USA Today,
3 June 2026
Noun
-
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
-
Doubt starts to feel like disloyalty.—
Vibhas Ratanjee,
Forbes.com,
1 June 2026
-
Discontent with congressional inaction also became an issue in Massie’s primary, as what was long celebrated as independence and principle was instead framed as disloyalty, grandstanding, and mindless obstructionism.—
W. James Antle III,
The Washington Examiner,
20 May 2026
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Cite this Entry
“Perfidiousness.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/perfidiousness. Accessed 6 Jun. 2026.
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