treachery Meaning, Definition & Usage
noun betrayal of a trust
noun an act of deliberate betrayal
perfidy; betrayal; treason.
Violation of allegiance or of faith and confidence; treasonable or perfidious conduct; perfidy; treason.
Be ware, ye lords, of their treachery. Chaucer.
In the council chamber at Edinburgh, he had contracted a deep taint of treachery and corruption. Macaulay.