merciless

adjective

mer·​ci·​less ˈmər-si-ləs How to pronounce merciless (audio)
: having or showing no mercy : pitiless
the merciless killing of innocent people
mercilessly adverb
mercilessness noun

Examples of merciless in a Sentence

the merciless killing of innocent people He has been merciless in his criticism of his opponent.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The straightforward task rapidly devolves into a perilous game of cat and mouse, when the merciless leader of a notorious crime syndicate sets his sights on claiming the organ for himself. Matt Grobar, Deadline, 2 Apr. 2025 The counterpoint to Pritzker’s light touch on Schumer is Rep. Alexandria Ocasio-Cortez, who has been merciless in her disapproval of Schumer’s decision. Philip Elliott, TIME, 19 Mar. 2025 Alas, this humble superfood has become rare and coveted in recent years, particularly during the past couple of months due to the merciless outbreaks of avian influenza. Catharine Kaufman, San Diego Union-Tribune, 18 Mar. 2025 Lottie proposes that Natalie be stripped of her title and that the merciless and vicious Shauna should lead them instead. Erin Qualey, Vulture, 14 Mar. 2025 See All Example Sentences for merciless

Word History

First Known Use

14th century, in the meaning defined above

Time Traveler
The first known use of merciless was in the 14th century

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Cite this Entry

“Merciless.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/merciless. Accessed 14 Apr. 2025.

Kids Definition

merciless

adjective
mer·​ci·​less ˈmər-si-ləs How to pronounce merciless (audio)
: having no mercy : pitiless
merciless slaughter
mercilessly adverb
mercilessness noun

More from Merriam-Webster on merciless

Last Updated: - Updated example sentences
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