Noun: perfidy pur-fi-dee
- Betrayal of a trust
"The perfidy of the double agent shocked both sides";
- perfidiousness, treachery
- An act of deliberate betrayal
"The perfidy of the double agent shocked even his handlers";
- treachery, betrayal, treason
Derived forms: perfidies
Type of: betrayal, dishonesty, disloyalty, knavery [archaic], roguishness
Encyclopedia: Perfidy