relentless

adjective

re·​lent·​less ri-ˈlent-ləs How to pronounce relentless (audio)
Synonyms of relentlessnext
: showing or promising no abatement of severity, intensity, strength, or pace : unrelenting
relentless pressure
a relentless campaign
relentlessly adverb
relentlessness noun

Examples of relentless in a Sentence

Her relentless optimism held the team together. The hunter was relentless in pursuit of his prey. a relentless opponent of deregulation
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.
Each one is a testament to his relentless determination and endless optimism. Steve Hartman, CBS News, 11 Apr. 2026 When Kirstie Rickert’s daughter was born a preemie two years ago, diaper rashes were a major and relentless struggle. Kate Sequeira, Los Angeles Times, 10 Apr. 2026 The rapid, relentless, exponential expansion of the Universe took whatever entropy might have pre-existed within a specific region of space — occupying a certain volume of space — and inflated that volume to tremendous quantities. Big Think, 9 Apr. 2026 But underneath an impressive resume with an equally impressive guest list lies a relentless fuel to make music that’s just as momentous. Deasia Paige, AJC.com, 8 Apr. 2026 See All Example Sentences for relentless

Word History

First Known Use

1592, in the meaning defined above

Time Traveler
The first known use of relentless was in 1592

Browse Nearby Words

Cite this Entry

“Relentless.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/relentless. Accessed 11 Apr. 2026.

Kids Definition

relentless

adjective
re·​lent·​less ri-ˈlent-ləs How to pronounce relentless (audio)
: not lessening in severity, intensity, strength, or pace : unrelenting
relentless criticism
relentlessly adverb
relentlessness noun

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