perfidious

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Samuel Pepys knew him; the British diarist thought him “a perfidious rogue.”

From The Wall Street Journal • Mar. 11, 2026

The head of one of them, who preferred to remain anonymous, described it as a "perfidious and effective" strategy.

From Barron's • Nov. 1, 2025

“If the initial findings are confirmed, it will be a perfidious attack on our electricity infrastructure,” Stübgen said.

From Seattle Times • Mar. 5, 2024

He also exerts a malignant perfidious influence over people who are vulnerable to such energy and temptations, but for whatever reason have not yet fully surrendered to them.

From Salon • Feb. 2, 2024

Among the perfidious, the name of traitor is capital in itself.

From "The Left Hand of Darkness" by Ursula K. Le Guin