treachery

noun4

1. •
   Deliberate, often calculated, disregard for trust or faith.

   • Suddenly, in the midst of high-camp treachery and sleuthery, each character does a star turn, breaking out in song. — 2002
2. •
   The act of violating the confidence of another, usually for personal gain.
3. •
   Treason.
4. •
   An act or instance of treachery.