perfidiousness

noun

Definition of perfidiousnessnext
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
  1. infidelity
  2. adultery
  3. betrayal
  4. perfidy
  5. disloyalty
Noun
  • Decades later, the first couple of rock and roll briefly split in 2016 after rumors of infidelity, but reconciled shortly thereafter.
    — Grace Gavilanes, PEOPLE, 20 Aug. 2026
  • Gripped by a paralyzing fear for the fate of her future children, Naama returns to the same monument where the infidelity took place; there, her parents appear before her.
    — Katie Campione, Deadline, 4 Aug. 2026
Definition of infidelity
Noun
  • Leontes, the king of Sicilia, has baselessly accused his wife, Hermione, of adultery, and the consequences have been dire.
    — Sara Holdren, Vulture, 12 Aug. 2026
  • Her adultery story initially evokes the imprisoned girl’s compensatory reveries, but over time its focus shifts.
    — Katy Waldman, New Yorker, 3 Aug. 2026
Definition of adultery
Noun
  • Finishing in 32nd place and nabbing the highest draft lottery odds still matter — even if the persistent betrayal of the NHL’s draft lottery balls remains an open wound in this market.
    — Thomas Drance, New York Times, 21 Aug. 2026
  • But that means in his own mind the abandonment and betrayal of his sense of identity as a tennis player who never gives up, who has staged so many comebacks.
    — John Hopewell, Variety, 19 Aug. 2026
Definition of betrayal
Noun
  • Platner, indeed, has boiled down nearly all political problems to the perfidy of sinister oligarchs.
    — Jonathan Chait, The Atlantic, 6 July 2026
  • 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
Definition of perfidy
Noun
  • The very quality that makes Oman useful—the ability to talk to everyone—can look like disloyalty.
    — Vivian Salama, The Atlantic, 21 Aug. 2026
  • And still, some people insist that admitting the flaws in our history — and our present — constitutes an act of innate disloyalty.
    — Orlando Sentinel Editorial Board, The Orlando Sentinel, 28 June 2026
Definition of disloyalty
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Browse Nearby Words

perfidious
perfidiousness
perfidy
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Cite this Entry

“Perfidiousness.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/perfidiousness. Accessed 26 Aug. 2026.

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