INDEFATIGABLY Synonyms: 13 Similar and Opposite Words

indefatigably

adverb

as in tirelessly

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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 indefatigably Selling cigarettes on the street to buy food for her siblings, the pre-teen is indefatigably upbeat, eagerly anticipating an imminent passage to Germany. — Guy Lodge, Variety, 24 Jan. 2026 Matthew Restall, for example, has worked indefatigably as a myth buster for dozens of misconceptions for roughly two decades now, and only recently did another historian, Camilla Townsend, stitch together the history of the Aztecs according to their own statements, as recorded in Nahuatl. — Literary Hub, 18 Aug. 2025

Recent Examples of Synonyms for indefatigably

Adverb

In his later years, Thomas suffered from cancer but continued to work tirelessly.

— Zac Ntim, Deadline, 14 Sep. 2026
The priests immediately started ministering on the streets and to the firefighters working tirelessly on the ground.

— Ashley Grams, CBS News, 9 Sep. 2026

Definition of tirelessly

Adverb

Replant the area with vigorously growing groundcovers or turfgrass because any spot of bare soil is an opportunity for stiltgrass to resprout.

— Nadia Hassani, The Spruce, 9 Sep. 2026
Cook, stirring vigorously and breaking up pockets of flour as needed, until a thin film forms on bottom and sides of pan and dough comes together into a single mass, 2–3 minutes.

— Alexia Duchêne, Bon Appetit Magazine, 3 Sep. 2026

Definition of vigorously

Adverb

In what is often considered Pelechian’s magnum opus, the ancient antagonism of nature and humanity plays out in a depiction of a remote farming community, energetically scored with Armenian folk music and Vivaldi’s The Four Seasons.

— Jill Goldsmith, Deadline, 18 Aug. 2026
Plenty of his peers filled the void, none more energetically than Chesney, who has by now built a beachy brand that almost rivals Buffett’s.

— Kelefa Sanneh, New Yorker, 19 July 2026

Definition of energetically

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indefatigable

indefatigably

indefeasible

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“Indefatigably.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/indefatigably. Accessed 17 Sep. 2026.

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Synonyms of indefatigably

adverb

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