Dictionary
per•fi•dy
Pronunciation: (pûr'fi-dē), [key]—
n.,
—pl. -dies.
1. deliberate breach of faith or trust; faithlessness; treachery:
perfidy that goes unpunished.
2. an act or instance of faithlessness or treachery.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.