perfidy
pur fi dee
- n betrayal of a trust
- n an act of deliberate betrayal
- Hector said that it was a case of ignominious perfidy when the authors failed to give him credit for research and analysis.
- Duped by perfidious bankers, Sharon is loathe to invest in any bank whatsoever.
- The attack across the borders, even when the ambassador was negotiating peace, could only be termed as perfidy.