as in infidelity
lack of faithfulness especially to one's husband or wife
perfidiousness eventually led to the couple's divorce
Synonyms & Similar Words
Relevance
Antonyms & Near Antonyms
Example Sentences
Recent Examples of Synonyms for perfidiousness
Noun
-
In later years, Lynn described her husband as supportive of her work but also difficult in their personal life, acknowledging struggles that included infidelity and physical abuse.—
Virginia Chamlee,
PEOPLE,
14 Apr. 2026 -
In more ways than one, Clark and Carol weren’t alone in their infidelity.—
Alison Herman,
Variety,
13 Apr. 2026
Noun
-
The Bible teaches that lying, stealing, adultery and coveting your neighbor’s property are sins.—
Sun Sentinel Editorial Board,
Sun Sentinel,
16 Mar. 2026
-
The facile novelty of adultery is its own mask, a sexy way of dressing up a deep, frightened longing for security.—
Sara Holdren,
Vulture,
6 Mar. 2026
Noun
-
SoulCycle, Flywheel, Peloton — the billion-dollar boutique fitness revolution built on ambition, betrayal and toxic sweat.—
Ryan Lattanzio,
IndieWire,
16 Apr. 2026
-
To do so—and this book is my attempt—would not, could not constitute a betrayal.—
Literary Hub,
Literary Hub,
15 Apr. 2026
Noun
-
Any time there is a crisis in Iran, the 1953 British-American coup against Prime Minister Mohammad Mossadegh is dusted off as Exhibit A in the case against Western perfidy.—
Bobby Ghosh,
Time,
5 Mar. 2026
-
But the mayor’s dramatic tale of his predecessor’s fiscal fiddling was designed with a clear political agenda in mind: both to underline the magnitude of the problem and to identify the villains responsible for this perfidy.—
Washington Post,
Washington Post,
29 Jan. 2026
Noun
-
Walt had long described himself as a benevolent father to his workers, and the strike seemed an act of personal betrayal and disloyalty verging on patricide.—
Literary Hub,
Literary Hub,
14 Apr. 2026
-
Pictures removed Azmoun later removed the pictures but was still lambasted on state TV on Thursday with soccer pundit Mohammad Misaghi saying the striker’s actions had been an act of disloyalty.—
Reuters,
CNN Money,
20 Mar. 2026
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.
Cite this Entry
“Perfidiousness.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/perfidiousness. Accessed 21 Apr. 2026.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
