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

Whatever Bankman-Fried’s intent may have been, Sequoia played in his sandbox willingly, drooling for perfidious profits every step of the way.

From Los Angeles Times • Nov. 8, 2023

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

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