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

Each one is crafted in the Swiss workshop, taking two years of meticulous work to come to fruition.

— Rachel Cormack, Robb Report, 5 Nov. 2026
This is where many researchers would have ended their work, but meticulous historic records allowed Kendall’s group to date each individual’s dentin issues even more precisely.

— Andrew Paul, Popular Science, 5 Nov. 2026

Definition of meticulous

Adjective

Speaking to hordes of mostly young fans at his Masterclass and later at a press conference and multiple one-on-one interviews, the indefatigable filmmaker reflected on the current state of affairs in the world.

— Anna Marie de la Fuente, Variety, 24 Oct. 2026
The indefatigable Hellboy and Sons of Anarchy star, now 76, has half a dozen films in production, and next year is aiming to play Ernest Hemingway in a new biopic set in Cuba and will co-star in the anticipated Sons of Anarchy spinoff Legends.

— Andreas Wiseman, Deadline, 14 Oct. 2026

Definition of indefatigable

Adjective

Change came in Senate races across the country, including in South Carolina, where the seat long held by the late senator Lindsey Graham, a tireless opponent of the Iranian regime, was lost by his sister to a Democratic challenger.

— Ishaan Tharoor, New Yorker, 5 Nov. 2026
Tobe Awaka is the only player who has earned Splitter’s complete approval, earning every minute he’s given on the court through tireless effort to claim any and all rebounds during his rotations.

— Julia Poe, Chicago Tribune, 1 Nov. 2026

Definition of tireless

Adjective

While its megacap rivals are currently engaged in a relentless, capital-intensive arms race to outspend one another on infrastructure, Apple's relatively low capex stands out as a testament to its disciplined capital allocation.

— Michael Khouw, CNBC, 2 Nov. 2026
The Storm was relentless in the second half with 10 shots on goal.

— Paul Johnson, Chicago Tribune, 31 Oct. 2026

Definition of relentless

Adjective

Once reading time kicked off during a recent meetup, the only sounds from the group were the quiet rustle of pages turning and the conscientious nibbling of snacks and sipping of tea as the cafe continued its bustle.

— Tribune News Service, Baltimore Sun, 22 Oct. 2026
Even if every senator were ethical, conscientious and committed to the public good, the incentives would remain the same.

— Nicholas Jacobs, The Conversation, 19 Oct. 2026

Definition of conscientious

Adjective

The statement was active for Coastal North Bay Including Point Reyes National Seashore, San Francisco Peninsula Coast, Northern Monterey Bay and Big Sur.

— CA Weather Bot, Sacbee.com, 4 Nov. 2026
Instead of the long-standing practice of relaying reports from states, the CDC now relies on federal death records, which can take weeks to come through and are not designed to capture the real-time data needed to respond to an active outbreak.

— Beth Mole, ArsTechnica, 3 Nov. 2026

Definition of active

Adjective

In this vivid and vigorous new biography, literary critic Hermione Lee makes the case for Brookner as a literary figure worth not only remembering but celebrating.

— Literary Hub, Literary Hub, 2 Nov. 2026
Some breathlessness during stair climbing can be normal, especially during vigorous activity.

— Kristen Gasnick, Verywell Health, 29 Oct. 2026

Definition of vigorous

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untired

untiring

untiringly

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“Untiring.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/untiring. Accessed 11 Nov. 2026.

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Synonyms of untiring

adjective

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