01 n. The act of violating faith or allegiance; violation of a promise or vow, or of trust reposed; faithlessness; treachery.
pl.
Perfidies ((pẽr"fĭ*dĭz))
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1.
The act of violating faith or allegiance; violation of a promise or vow, or of trust reposed; faithlessness; treachery.“The ambition and perfidy of tyrants.” — Macaulay.“His perfidy to this sacred engagement.” — DeQuincey.