UNTIRING Synonyms: 72 Similar and Opposite Words

untiring

adjective

ˌən-ˈtī-riŋ

Definition of untiring

as in meticulous

showing no signs of weariness even after long hard effort the camel's reputation as an untiring beast of burden the detective's untiring investigation of the crime finally led to several arrests

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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 untiring All speakers paid tribute to Jack Gross, owner of the new station, for his untiring efforts to bring San Diego its own television station. — sandiegouniontribune.com, 17 May 2018 Still, Clark's adrenaline and untiring preparation propelled her to a second place finish in Oslo and a third place finish at the Burton US Open the following month. — Nihal Kolur, SI.com, 30 Oct. 2017 The public eye in Pakistan today is an unforgiving, untiring beast that never sleeps. — chicagotribune.com, 4 Aug. 2017 Corrupt regimes long reviled by their populace are being brought down left and right, thanks to the brilliant and untiring efforts of democracy activists. — Bruce Sterling, WIRED, 16 Feb. 2011

Recent Examples of Synonyms for untiring

Adjective

An immaculate natural setting, meticulous interior design, simple pleasures such as a complete sense of privacy, and impeccable service are just some of the highlights.

— Condé Nast, Condé Nast Traveler, 20 Aug. 2026
When the scant blood trail disappeared, Charles began the meticulous hands-and-knees job of track-trailing the buck.

— Jeff Murray, Outdoor Life, 20 Aug. 2026

Definition of meticulous

Adjective

And while Foy is appealing as the indefatigable mother, Garfield leans too heavily into manic cutesiness as the endlessly chirpy father who at times seems less grown-up than his children.

— Frank Scheck, HollywoodReporter, 20 Aug. 2026
The vehicle’s pearlescent sheen alone is worthy of a moment in the sun, and gives the car a timelessness on par with that of its indefatigable owner.

— Viju Mathew, Robb Report, 15 Aug. 2026

Definition of indefatigable

Adjective

The film seeks to celebrate Guillén’s life while honoring the tireless advocacy of her family, whose campaigning inspired lasting legislative change and amplified the voices of military families.

— Andreas Wiseman, Deadline, 19 Aug. 2026
Banks, the first saxophonist to receive the prestigious Avery Fisher Award, is a tireless advocate for his instrument in the classical world.

— Beth Wood, San Diego Union-Tribune, 16 Aug. 2026

Definition of tireless

Adjective

The gross margin outlook was a bit lower than expected, with Kress attributing the crunch to the relentless rise in memory prices, both for the remainder of this fiscal year and for fiscal 2028.

— Zev Fima, CNBC, 27 Aug. 2026
Fans, artists, and leaders across all industries are mourning the star whose relentless optimism, grace, and resilience was a shining light.

— Charisma Madarang, Rolling Stone, 26 Aug. 2026

Definition of relentless

Adjective

Less so is the fact that more vulnerabilities are being discovered by bounty hunters assisted by AI tools, leaving Google fighting a battle to patch them before less conscientious hackers find them and put them to criminal use.

— Davey Winder, Forbes.com, 21 Aug. 2026
The reptile dealers need to be more conscientious, and there needs to be more captive breeding.

— Katie Campione, Deadline, 21 Aug. 2026

Definition of conscientious

Adjective

Every active iPhone, iPad, or Mac sold generates continuous cash flow regardless of whether the owner upgrades their physical device that year.

— Morgan Chittum, CNBC, 25 Aug. 2026
Meta reported in July that Instagram has 2 billion daily active users — nearly a quarter of the Earth's population.

— John Ruwitch, NPR, 25 Aug. 2026

Definition of active

Adjective

Puppies should not engage in vigorous tug-of-war games because too much tugging can create jaw or bite problems.

— BestReviews, Chicago Tribune, 25 Aug. 2026
Second, legislation should promote vigorous competition among teams and conferences, not preserve the exclusive club of the current Power Four membership.

— U.S. Sen. Richard Blumenthal, Hartford Courant, 24 Aug. 2026

Definition of vigorous

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“Untiring.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/untiring. Accessed 29 Aug. 2026.

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Synonyms of untiring

adjective

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