INDEFATIGABLE Synonyms: 72 Similar and Opposite Words

indefatigable

adjective

ˌin-di-ˈfa-ti-gə-bəl

Definition of indefatigable

as in meticulous

showing no signs of weariness even after long hard effort an indefatigable laborer who can work from sunrise to sunset

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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 indefatigable New York cooks up offense around the indefatigable Brunson and Towns’ newfound playmaking chops. — Esfandiar Baraheni, New York Times, 3 June 2026 The Shark, so named early on for his intensity as basketball coach, dean and indefatigable fundraiser, stepped down from the Columbus presidency in 2018 but assumed his current, and final, role. — Howard Cohen, Miami Herald, 1 June 2026 Harry Styles' stage is a pop playground Styles’ laudable core band – anchored by his longtime drummer, the indefatigable Sarah Jones, who makes tricky beats look simple – was augmented by strings and horns on several tracks, a testament to his ambitious musical aspirations. — Melissa Ruggieri, USA Today, 17 May 2026 The evening encapsulated many special things about Nelson—including his indefatigable quest to harness music and community to uplift the working class. — Andrew R. Chow, Time, 14 May 2026 See All Example Sentences for indefatigable

Recent Examples of Synonyms for indefatigable

Adjective

Well, Apple’s meticulous planning means previous years can give us clues as to what will happen when.

— David Phelan, Forbes.com, 10 July 2026
Because of the tapestry’s fragility, the transfer required meticulous planning.

— Tiago Ventura, Time, 10 July 2026

Definition of meticulous

Adjective

Humans chose the victim, supplied credentials and set up the attack infrastructure, but instead of human collaborators, AI was used as a trusty, fast, tireless cybercrime assistant.

— Ron Schmelzer, Forbes.com, 10 July 2026
Honoring first responders During a ceremony on July 4, acting Venezuelan President Delcy Rodriguez honored rescuers from 18 countries and their search dogs for their tireless efforts in helping the country recover.

— Pat Mueller, USA Today, 7 July 2026

Definition of tireless

Adjective

The timing of the recording reflects a band whose relentless touring had sharpened both its confidence and its new material.

— SPIN Staff, SPIN, 8 July 2026
The Los Angeles Dodgers, renowned for their relentless pursuit of championships, faced intense trade speculation last year concerning third baseman Max Muncy.

— Peter Chawaga, Forbes.com, 8 July 2026

Definition of relentless

Adjective

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, 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

Definition of untiring

Adjective

The exhibition’s framing of Hamdi as the conscientious Orientalist feels slyly designed to disarm judgment of his work, and even to neutralize his professional misdeeds.

— Zachary Fine, New Yorker, 13 July 2026
Earth-friendly, conscientious gardeners learn to slow down and pay attention — not only to plants but to the many creatures that share the garden.

— Rita Perwich, San Diego Union-Tribune, 4 July 2026

Definition of conscientious

Adjective

The animal, fizzing with the inexhaustible energy of a creature bred for hauling chockablock toboggans, was confined to a tiny pen, a mere twenty feet square, behind the neighbor’s trailer.

— Literary Hub, Literary Hub, 10 July 2026
Denmark has a seemingly inexhaustible supply of acting talent, and The Guest is proof of that.

— Damon Wise, Deadline, 6 July 2026

Definition of inexhaustible

Adjective

Lettuce and other leafy foods with multiple layers pose a higher risk of contamination, but with a vigorous wash and peeling the outer layers, even the greens can be saved.

— Christopher Buchanan, Los Angeles Times, 8 July 2026
The water should be brought to a vigorous rolling boil and then boiled for two minutes.

— Mary Ella Hastings July 8, Fort Worth Star-Telegram, 8 July 2026

Definition of vigorous

Browse Nearby Words

in deep water

indefatigable

indefatigably

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“Indefatigable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/indefatigable. Accessed 16 Jul. 2026.

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Synonyms of indefatigable

adjective

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