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
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What follows is a hilarious account of infatuation and infidelity from the point of view of Roberta, a graduate student who has it bad for Simone, her utterly chic — and married — writing professor.—
Jasmine Vojdani,
Vulture,
1 Aug. 2025 -
One of the major causes of broken trust between partners is infidelity, but breaches of trust can happen for many other reasons.—
Mark Travers,
Forbes.com,
31 July 2025
Noun
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In addition, Swazi law has a different definition of adultery for men and for women.—
The Editors,
JSTOR Daily,
15 Aug. 2025
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Certain artistic genres were employed to publicize and critique changes to laws regarding adultery and divorce.—
Smithsonian Magazine,
Smithsonian Magazine,
29 July 2025
Noun
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Keating said this was nothing but a disgusting betrayal that the U.S. government would not take care of those people who took care of them.—
Livi Stanford,
Hartford Courant,
6 Aug. 2025
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As Morgan’s teenage daughter Clara (Grace) is falling in love for the first time with Miller (Thames), the duo must face tragedy and uncover new betrayals after Morgan’s husband (Scott Eastwood) dies in a car accident with her sister Jenny.—
Brittany Spanos,
Rolling Stone,
5 Aug. 2025
Noun
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Their perfidy is memorialized in the English language, though.—
Evan Osnos,
New Yorker,
26 May 2025
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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
Noun
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In March, Justice Barrett joined Justice John Roberts and the liberal justices in blocking President Donald Trump’s effort to freeze $2 billion in U.S. Agency for International Development funds, prompting fierce backlash from Make America Great Again conservatives who saw it as disloyalty.—
Heather Hunter,
The Washington Examiner,
28 July 2025
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Leaders can flip this narrative by framing reporting as an act of strength and loyalty, not disloyalty.—
Rhett Power,
Forbes.com,
6 July 2025
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Cite this Entry
“Perfidiousness.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/perfidiousness. Accessed 19 Aug. 2025.
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