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.
Her fateful decision proves to have great consequences, and Jude tracks her subsequent guilt trip with merciless humanity, echoing Rossellini’s Europa ’51. Jill Goldsmith, Deadline, 5 Aug. 2025 People often hear the word budget and think of dieting –– punishment, restriction and merciless cost cutting. Madeline Holcombe, CNN Money, 4 Aug. 2025 While Israel was conducting its war in Gaza with a merciless bludgeon and no conception of an ending, its tactics against Hezbollah—setting off the beeper bombs, wiping out its missile stocks and weapons depots, killing its military and political leaders—proved far better targeted. David Remnick, New Yorker, 28 July 2025 Private equity moving into professional sports conjures the same fears of merciless efficiency in an industry driven by sentimentality, but Arougheti brushes off the concerns, arguing that institutional capital will increase profitability and allow owners to invest more in their teams. Leo Schwartz, Fortune, 21 July 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 20 Aug. 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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