mortal enemy

noun

: someone one hates very much and for a long time

They've been mortal enemies for many years.

Examples of mortal enemy in a Sentence

Recent Examples on the Web

While Cheeto treats the fabric feline like a mortal enemy, Romeow lounges on the counter, casting the occasional glance but remaining perfectly calm. —Daniel R. Depetris, Newsweek, 10 Jan. 2025

Unlike Gi-hun, the audience is in on the secret that Player 001 is actually a mortal enemy. —Patrick Brzeski, The Hollywood Reporter, 26 Dec. 2024

Not your best friend, your mortal enemy, Ran Carthon and Amy Adams Strunk or either of the Mike Myers characters on my wall. —Nick Suss, The Tennessean, 20 Dec. 2024

The government of Turkey, a member of NATO, identifies with the Muslim Brotherhood, which Egypt and Saudi Arabia regard as a mortal enemy. —Michael Mandelbaum, Foreign Affairs, 12 Feb. 2019

Yeah, that's Ross's daughter, making Bruce Banner Ross's mortal enemy and father-in-law. —Meredith G. White, The Arizona Republic, 12 July 2024

Check out our new ghost-pepper chip that’s better than the one made by our new mortal enemy, Trader Joe’s! —Brandon Follick, The New Yorker, 27 June 2024

Those yelling the loudest that Russia is a mortal enemy of the United States and that Trump is Russian President Vladimir Putin’s puppet are the very same people who woefully mismanaged U.S. foreign policy over the past quarter century. —Randall Schweller, Foreign Affairs, 14 Aug. 2018

Starring Kyle MacLachlan as Paul and Sting as his mortal enemy, Feyd-Rautha Harkonnen, the movie proved to be a daunting task to execute, given the limits of technology at the time. —Rebecca Aizin, Peoplemag, 1 June 2024