relentless

adjective

ri-ˈlent-ləs How to pronounce relentless (audio)
Definition of relentlessnext
as in grim
showing no signs of slackening or yielding in one's purpose the team's offense was relentless in trying to score a touchdown

Synonyms & Similar Words

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Antonyms & Near Antonyms

Example Sentences

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.
Recent Examples of relentless The first episode started with poor Struan Loy getting stalked and later torched alive by a pair of Russian assassins as relentless and seemingly unkillable as Michael Myers or Jason Voorhees. — Scott Tobias, Vulture, 21 Oct. 2026 The classic free-radical theory of aging, first proposed in the 1950s, held that aging itself resulted from the relentless buildup of ROS in our cells, decade after decade, and the wear and tear this caused. — Rowan Jacobsen, Scientific American, 20 Oct. 2026 But with Ha-Meem’s energy bills rising from roughly $200,000 to $300,000 every day, and clients refusing to budge on prices, there is a relentless drive to boost efficiency. — Charlie Campbell, Time, 20 Oct. 2026 That left Daniela Avanzini, Lara Raj, Megan Skiendiel and Yoonchae Jeung to carry a 19-song show that demanded extraordinary stamina, with relentless choreography executed in everything from chunky platform boots to precarious-looking silver heels. — Théoden Janes, Charlotte Observer, 20 Oct. 2026 See All Example Sentences for relentless
Recent Examples of Synonyms for relentless
  1. grim
  2. determined
  3. persistent
  4. unrelenting
  5. ruthless
Adjective
  • The discovery raises the possibility of a grim outcome in the search for the four men, which has led to El Salvador deploying 450 special forces soldiers to Haiti as of Friday to aid the gang-fighting force in the search.
    — Jacqueline Charles, Miami Herald, 25 Oct. 2026
  • The arc of Bradley Whitford’s career makes for a grim report card on the state of the country.
    — David Mack, CNN Money, 25 Oct. 2026
Definition of grim
Adjective
  • The overwhelming problem of plastic From flax that can be used in clothing and cars to robotic skimmers to stricter laws, determined researchers, activists and volunteers fight an industry intent on making more plastic.
    — Michael Hawthorne, Chicago Tribune, 22 Oct. 2026
  • That witness said Foss left a cellphone behind after their interaction, which was later determined to have belonged to Lussier.
    — Stephen Swanson, CBS News, 22 Oct. 2026
Definition of determined
Adjective
  • Those capabilities could help address a persistent challenge in counter-drone warfare.
    — Aamir Khollam, Interesting Engineering, 24 Oct. 2026
  • This cycle of price increases serves not only to offset immediate fuel price spikes, but also to make up for unadjusted pricing power lost in recent years due to flight overcapacity, fare suppression, and persistent inflation.
    — , CNBC, 23 Oct. 2026
Definition of persistent
Adjective
  • But the unrelenting efforts of survivors led Congress to pass the Epstein Files Transparency Act in late 2025, which Trump signed into law, leading to the release of millions of FBI and Department of Justice files on the case earlier this year.
    — Julie K. Brown, Miami Herald, 26 Oct. 2026
  • The Los Angeles Dodgers failed to reach the World Series for the third consecutive season, getting swept by the unrelenting Milwaukee Brewers superteam.
    — Ian Miller OutKick, FOXNews.com, 23 Oct. 2026
Definition of unrelenting
Adjective
  • The rest would kill her just for being her mother’s daughter—like Xaden Riorson, the most powerful and ruthless wingleader in the Riders Quadrant.
    — Lexy Perez, HollywoodReporter, 15 Oct. 2026
  • Facinelli plays the Boss, a ruthless figure whose cash ends up in the pool hustler’s hands, and intends to get it back, one way or another.
    — Zac Ntim, Deadline, 14 Oct. 2026
Definition of ruthless

Browse Nearby Words

relenting
relentless
relentlessness
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Cite this Entry

“Relentless.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/relentless. Accessed 28 Oct. 2026.

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