- deliberate breach of faith or trust; faithlessness; treachery: perfidy that goes unpunished.
- an act or instance of faithlessness or treachery.
Origin of perfidy
Examples from the Web for perfidy
And there was a crash involved—in Ukrainian perfidy and EU sanctions both.Up To a Point: Binge Watching Putin's Propaganda Network
P. J. O’Rourke
September 20, 2014
Grace has been especially severe on the 12-person jury, which she has accused of all manner of perfidy.Nancy Grace Has Feelings, Too
July 9, 2011
My shame I might bear; I might wash it out in blood at the battle's front; but my perfidy!The Cavalier
George Washington Cable
His not having spoken of marriage may add to his perfidy, but can be no excuse for his conduct.The Contrast
We had another instance, about this time, of the perfidy of Harlay.The Memoirs of Louis XIV., His Court and The Regency, Complete
Duc de Saint-Simon
The king and his mother were mortified by these evidences that their perfidy was suspected.Henry IV, Makers of History
John S. C. Abbott
For even Delilah was a Philistine, and by her perfidy served her country.The Wild Geese
Stanley John Weyman
- a perfidious act
Word Origin and History for perfidy
1590s, from Middle French perfidie (16c.), from Latin perfidia "faithlessness, falsehood, treachery," from perfidus "faithless," from phrase per fidem decipere "to deceive through trustingness," from per "through" (see per) + fidem (nominative fides) "faith" (see faith).
[C]ombinations of wickedness would overwhelm the world by the advantage which licentious principles afford, did not those who have long practiced perfidy grow faithless to each other. [Samuel Johnson, "Life of Waller"]