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perfidy

[pur-fi-dee] /ˈpɜr fɪ di/
noun, plural perfidies.
1.
deliberate breach of faith or trust; faithlessness; treachery:
perfidy that goes unpunished.
2.
an act or instance of faithlessness or treachery.
Origin
1585-1595
1585-95; < Latin perfidia faithlessness, equivalent to perfid(us) faithless, literally, through (i.e., beyond the limits of) faith (per- per- + fid(ēs) faith + -us adj. suffix) + -ia -y3
Synonyms
See disloyalty.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for perfidy
  • The perfidy and mendacity that follow mesmerize as much as they ring true.
  • For example, the extent and perfidy of the "ethanol" scam is now coming to light.
  • But she's sharp on the nitty-gritty of female friendships and male perfidy.
  • That would be just rewarding them for their perfidy.
  • The words used in picturing my perfidy cannot be repeated in polite society.
  • Even scientific obfuscation and perfidy come to play on many of these topics.
  • And while such rough handling might deter others from similar perfidy, it comes at a high social cost.
  • Nothing is beyond their perfidy.
  • When not in the heat of battle they struggle against the perfidy of man and the unpredictability of nature.
  • It very much smells of intrigue and perfidy.
British Dictionary definitions for perfidy

perfidy

/ˈpɜːfɪdɪ/
noun (pl) -dies
1.
a perfidious act
Word Origin
C16: from Latin perfidia, from perfidus faithless, from per beyond + fidēs faith
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for perfidy
n.

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"]

Online Etymology Dictionary, © 2010 Douglas Harper
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