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

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Maybe death at the hands of your mortal enemy doesn’t need to be quick and painless. — Amanda Whiting, Vulture, 29 June 2026 Al Qaeda and Islamic State generally view Shiites as infidels and consider Iran a mortal enemy. — Foreign Correspondent, Los Angeles Times, 1 Mar. 2026 And many in the Make America Healthy Again movement led by Kennedy consider glyphosate to be a mortal enemy. — Alex Hogan, STAT, 26 Feb. 2026 Yet for young Bangladeshis today, Jamaat represents the incorruptible while India is the mortal enemy. — Charlie Campbell, Time, 28 Jan. 2026 See All Example Sentences for mortal enemy