relentless

adjective

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

Synonyms of relentless

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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.
That’s when another event, GRB 250702B, revealed itself in all its relentless, savage glory. — Robin George Andrews, Scientific American, 20 Oct. 2026 Since 2017, Dulgarian has grown TAGABOW from its placid, solo origins into one of the decade’s most influential and inventive shoegaze bands; the proof is in Lotto, their bold and relentless breakout LP from last year. — Abby Jones, Pitchfork, 19 Oct. 2026 Days of this relentless wave action could worsen ongoing beach erosion, especially in parts of the Outer Banks, where homes have crumbled into the sea in recent years and roadways have washed away. — Mary Gilbert, CNN Money, 17 Oct. 2026 Russia’s competitive advantage In this battle for the sky, the pace of innovations is relentless. — Gerard Toal, The Conversation, 16 Oct. 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

relentingly
relentless
relentment
See all Nearby Words

Cite this Entry

“Relentless.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/relentless. Accessed 20 Oct. 2026.

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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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