Perfidy Definition
pûrfĭ-dē
perfidies
noun
perfidies
The deliberate breaking of faith; betrayal of trust; treachery.
Webster's New World
The act or an instance of treachery.
American Heritage
(law) Specifically, in warfare, an illegitimate act of deception, such as using symbols like the Red Cross or white flag to gain proximity to an enemy for purposes of attack.
Wiktionary
Other Word Forms of Perfidy
Noun
Singular:
perfidy
Plural:
perfidiesOrigin of Perfidy
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Latin perfidia from perfidus treacherous per- to destruction per– fidēs faith bheidh- in Indo-European roots
From American Heritage Dictionary of the English Language, 5th Edition
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From Latin perfidus (“faithless, treacherous, false"), from fides (“faith"); related to, for example, English fidelity.
From Wiktionary
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