1. The leader's perfidy was discovered when it was revealed that he had been embezzling funds from the company.
2. She was shocked by her best friend's perfidy when she found out she had been spreading rumors about her.
3. His act of perfidy in betraying his country during wartime led to severe consequences.
4. The villain's perfidy knew no bounds as he manipulated and deceived those around him.
5. The politician's perfidy was exposed when evidence of his corrupt dealings came to light.
6. The employee's perfidy was revealed when it was discovered that he had been stealing from the company for years.
7. The spy's perfidy was uncovered when his double-crossing ways were revealed to his superiors.
8. The king was outraged by his advisor's perfidy in plotting against him behind his back.
9. The criminal's perfidy was evident in the way he lied and cheated his way through life.
10. The betrayal and perfidy of her trusted friend left her heartbroken and wary of trusting anyone again.