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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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 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

The British yard, which revealed its first catamaran at the Cannes Yachting Festival in early September, today unveiled a new flagship sailing superyacht that combines elegant design and meticulous craftsmanship with bluewater cruising capability.

— Rachel Cormack, Robb Report, 24 Sep. 2026
Its $150, four-course menu balances meticulous technique with deep comfort.

— Bill Addison, Los Angeles Times, 24 Sep. 2026

Definition of meticulous

Adjective

Musicians Julien Baker and Lucy Dacus, Saturday Night Live’s Sarah Sherman, Oscar winner and indefatigable activist Susan Sarandon, and Einbinder all showed up to rebuke the speech, citing the UN’s own labeling of Israel’s war on Gaza a genocide.

— Ryan Coleman, Entertainment Weekly, 25 Sep. 2026
Massi is an indefatigable presence on this boat, one of the most competent workers this franchise has ever seen.

— Rafaela Bassili, Vulture, 22 Sep. 2026

Definition of indefatigable

Adjective

But among their best qualities, Dick Riordan was arrogantly confident, Jim Hahn had a steady hand on the tiller, Antonio Villaraigosa was tireless and passionate, Eric Garcetti was a long-range thinker on earthquakes, water and energy.

— Steve Lopez, Los Angeles Times, 25 Sep. 2026
Beck was an art piece, a Happening, a mobile performance installation made by the tireless work of a small coterie of people, including Leigh.

— Josephine Reisman, Vulture, 24 Sep. 2026

Definition of tireless

Adjective

The size of these companies has been a seismic change, as has the market’s relentless concentration around tech.

— Allie Garfinkle, Fortune, 28 Sep. 2026
Russia kept up its relentless round-the-clock attacks on the Ukrainian capital, hitting an office block where four people were killed, Zelenskyy said.

— HANNA ARHIROVA, Arkansas Online, 26 Sep. 2026

Definition of relentless

Adjective

The output of such organizations affects everyone, and a conscientious official may reasonably fear that exiting in a crisis will only accelerate it.

— Eyal Press, New Yorker, 28 Sep. 2026
Almost 7% of Tarrant County kindergarteners had a conscientious exemption to at least one vaccine in the 2025-26 school year, up from 3% five years ago, according to state data.

— Ciara McCarthy, Fort Worth Star-Telegram, 14 Sep. 2026

Definition of conscientious

Adjective

Ecuador, Peru, and Chile draw nature enthusiasts seeking soft or active adventure; and each of these destinations is also often found on the lists of must-see places for the well-traveled.

— Condé Nast, Condé Nast Traveler, 30 Sep. 2026
Chinese labs manufacture about 20% of the active ingredients used to make medicines the FDA considers essential.

— Patrick McHenry, STAT, 30 Sep. 2026

Definition of active

Adjective

The guidelines also recommend pairing the strength training with 150–300 minutes of moderate-intensity aerobic activity (or 75–150 minutes of vigorous activity) each week.

— Melissa Rudy, FOXNews.com, 29 Sep. 2026
Miss Neal is vibrant and lovely as the young widow, and Hugh Marlowe is vigorous as her ambitious suitor.

— THR Staff, HollywoodReporter, 28 Sep. 2026

Definition of vigorous

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“Untiring.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/untiring. Accessed 2 Oct. 2026.

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Synonyms of untiring

adjective

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