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
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
Meta is considered vulnerable because OpenAI, which looks like a mortal enemy, is attacking it with a ton of Nvidia.
—Jim Cramer, CNBC, 19 Nov. 2025
For the one whose mortal enemy is humidity.
—Jeaneen Russell, PEOPLE, 15 Nov. 2025
This all starts when Adriana shows up at her mortal enemy, Marysol’s, house because Marysol is hosting a gifting suite that also doubles as a holiday party.
—Brian Moylan, Vulture, 26 Sep. 2025
And as Berend insinuates himself ever deeper into his life, Andor identifies him as a mortal enemy, not knowing that there is much — much — more to this story than first meets his eye.
—Damon Wise, Deadline, 28 Aug. 2025
Tens of millions of Russians, including senior officials and many of the country’s wealthiest people, now view the West as a mortal enemy.
—Alexander Gabuev, Foreign Affairs, 17 Apr. 2025
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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
Meta is considered vulnerable because OpenAI, which looks like a mortal enemy, is attacking it with a ton of Nvidia.
—Jim Cramer, CNBC, 19 Nov. 2025
For the one whose mortal enemy is humidity.
—Jeaneen Russell, PEOPLE, 15 Nov. 2025
This all starts when Adriana shows up at her mortal enemy, Marysol’s, house because Marysol is hosting a gifting suite that also doubles as a holiday party.
—Brian Moylan, Vulture, 26 Sep. 2025
And as Berend insinuates himself ever deeper into his life, Andor identifies him as a mortal enemy, not knowing that there is much — much — more to this story than first meets his eye.
—Damon Wise, Deadline, 28 Aug. 2025
Tens of millions of Russians, including senior officials and many of the country’s wealthiest people, now view the West as a mortal enemy.
—Alexander Gabuev, Foreign Affairs, 17 Apr. 2025
Cite this Entry
“Mortal enemy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mortal%20enemy. Accessed 13 Mar. 2026.
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