1
as in infidelity
lack of faithfulness especially to one's husband or wife
his wife's perfidy was a moment of uncharacteristic weakness
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2
as in treachery
the act or fact of violating the trust or confidence of another
the full cost—both in compromised intelligence and in human life—of the double agent's perfidy is not yet known
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Examples of perfidy in a Sentence
Recent Examples on the Web
London audiences welcomed a scathing romp about the perfidies of global capitalism.
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Rebecca Mead, The New Yorker, 4 Mar. 2024
This violates the prohibition to kill or injure the adversary by resorting to perfidy, Sari said.
—Ellie Kaufman, ABC News, 30 Jan. 2024
Jim Geraghty has demonstrated the political perfidy in the White House’s approach to debt relief.
—Noah Rothman, National Review, 9 Oct. 2023
The conventional wisdom about the impact of World War I on the Middle East is that in the wake of the collapse of the Ottoman Empire, European perfidy carved up the region and determined its future.
—Jonathan Wyrtzen, Foreign Affairs, 28 Feb. 2023
See all Example Sentences for perfidy 
Rebecca Mead, The New Yorker, 4 Mar. 2024
This violates the prohibition to kill or injure the adversary by resorting to perfidy, Sari said.
—Ellie Kaufman, ABC News, 30 Jan. 2024
Jim Geraghty has demonstrated the political perfidy in the White House’s approach to debt relief.
—Noah Rothman, National Review, 9 Oct. 2023
The conventional wisdom about the impact of World War I on the Middle East is that in the wake of the collapse of the Ottoman Empire, European perfidy carved up the region and determined its future.
—Jonathan Wyrtzen, Foreign Affairs, 28 Feb. 2023
See all Example Sentences for perfidy
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'perfidy.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
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“Perfidy.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/perfidy. Accessed 1 Oct. 2024.
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