perfidy
/ˈpɜrfɪdi/
noun
- The act of betraying someone's trust; deliberate dishonesty or treachery.
- The treaty was broken by an act of perfidy that led to war.
- He could not believe the perfidy of his best friend, who had lied to him for years.
- In the novel, the villain's perfidy is revealed in the final chapter.
Synonyms