untiring

un·tir·ing
U1N1T1I1R1I1N1G2
UK/(ˌ)ʌnˈtaɪəɹɪŋ/UK/(ˌ)ʌnˈtaɪɹɪŋ/US/ˌʌnˈtaɪəɹɪŋ/US/ˌʌnˈtaɪɹɪŋ/

adjective

Not able to be tired; inexhaustible, tireless.

UncommonScrabble 9

Meanings

untiring1

adjectiveuntiring (comparative more untiring, superlative most untiring)

comparative more untiring · superlative most untiring

  1. Not able to be tired; inexhaustible, tireless.

    Alice had dropped senseless on the earth, and Cora had sunk at her side, hovering, in untiring tenderness, over her lifeless form.

    1826, [James Fenimore Cooper], chapter XVII, in The Last of the Mohicans; a Narrative of 1757. […], volume I, Philadelphia, Pa.: H[enry] C[harles] Carey & I[saac] Lea— […], →OCLC, page 278
    3 more examples

    He [Rev. John Knowles Montgomery] was a man of untiring energy and force of character, and accomplished what his predecessor could not do, as he introduced the Congregational form of church management.

    1916 February 15 (date delivered), W. W. Tasker, “Matthew Henry’s Chapel”, in Journal of the Chester and North Wales Archæological & Historic Society, volume XXII (New Series), Chester, Cheshire: Printed and published for the Society by G. R. Griffith, […], published 1918, →OCLC, page 190

    It was the time of low Nile when all the land is baked like a crust of bread, when the creaking of the shadoofs and the singing croak of the sakkia are heard the night long like untiring crickets with throats of frogs.

    1902, Gilbert Parker, “The Man at the Wheel”, in Donovan Pasha and Some People of Egypt, Toronto, Ont.: The Copp, Clark Company, →OCLC, page 154

    The Sawhorse is the favorite steed of Princess Ozma, the Ruler of the Land of Oz, and he lives in a stable decorated with pearls and emeralds, at the rear of the royal palace. He is swift as the wind, untiring, and is kind to his friends.

    1913 July 1, L[yman] Frank Baum, “Scraps and the Scarecrow”, in The Patchwork Girl of Oz, Chicago, Ill.: The Reilly & Lee Co., →OCLC, page 173

    Synonyms: indefatigable, inexhaustible, indefatigable, tireless, unflagging, unweariable, unwearying, weariless

  2. figurativelyResolute, unfailing.

    So, with great perseverance and untiring industry, he prospered.

    1859, Charles Dickens, “Two Promises”, in A Tale of Two Cities, London: Chapman and Hall, […], →OCLC, book II (The Golden Thread), page 86
    2 more examples

    VVhat inexpreſſible ſenſation of delight does the ſoul at theſe moments conceive? Celeſtial bliſs! untiring, unabated rapture!

    1769, John Shebbeare, “The Different Sensations in the Human Breast, which Accompany What We Love, and What We Hate. Lady Flimsy’s Letter to Lady Liberal on that Subject.”, in Lydia, or Filial Piety. […], 2nd edition, volume II, London: […] T[homas] Davies, […], →OCLC, page 205

    A generation ago Chien-ch'ang was perhaps the least known part of all China to the outside world. About the middle of the thirteenth century the Mongol, Kublai Khan, acting as general of the forces of his brother, Genghis Khan, went through here to the conquest of Tali, then an independent kingdom in the southwest, and the untiring Venetian [Marco Polo] following in his train noted a few of the characteristics of Caindu, the name he gave both to the valley and the capital city.

    1913 February, Elizabeth [Kimball] Kendall, “The Chien-ch’ang”, in A Wayfarer in China: Impressions of a Trip across West China and Mongolia, Boston, Mass.; New York, N.Y.: Houghton Mifflin Company […], →OCLC, pages 73–74

    Synonyms: tireless

untiring2

verb
  1. gerundparticiplepresentpresent participle and gerund of untire

Synonyms & antonyms

adjectiveNot able to be tired; inexhaustible, tireless.

adjectiveResolute, unfailing.

Similar

More synonyms by meaning

adjectivecharacterized by hard work and perseverance

Synonym sets from Open English WordNet, CC BY 4.0.

Origin

untiring · adjective

  1. Proto-Indo-European*né
  2. Proto-Indo-European*n̥-
  3. Proto-Germanic*un-
  4. Proto-West Germanic*un-
  5. Old Englishun-
  6. Middle Englishun-
  7. Englishun-
  8. Englishtiring
  9. Englishuntiring

From un- (prefix meaning ‘not’) + tiring (“that tire or tires”, adjective).

Full word history & related roots →

untiring · verb

  1. Proto-Indo-European*h₂ent-
  2. Proto-Indo-European*h₂énts
  3. Proto-Germanic*anda-
  4. Proto-West Germanic*anda-
  5. Old Englishand-
  6. Old Englishon-
  7. Middle Englishon-
  8. Englishun-
  9. Proto-West Germanic*teuʀōn
  10. Old Englishtēorian
  11. Middle Englishtiren
  12. Englishtire
  13. Englishuntire
  14. Englishuntiring

From untire (verb) + -ing (suffix forming present participles of verbs).

Full word history & related roots →

Translations

Ancient Greek ἀκάμας, ἀκάματος
  • ἀκάμας (akámas)not able to be tired — see also inexhaustible
  • ἀκάματος (akámatos)not able to be tired — see also inexhaustible
  • ἀκοπίαστος (akopíastos)not able to be tired — see also inexhaustible
Bulgarian неуморен
  • неуморен (neumoren)not able to be tired — see also inexhaustible
Danish utrættelig
  • utrættelignot able to be tired — see also inexhaustible
Finnish uupumaton, väsymätön
  • uupumatonnot able to be tired — see also inexhaustible
  • väsymätönnot able to be tired — see also inexhaustible
French infatigable
  • infatigablenot able to be tired — see also inexhaustible
Norwegian Bokmål utrettelig, utrøttelig
  • utrettelignot able to be tired — see also inexhaustible
  • utrøttelignot able to be tired — see also inexhaustible

Rhymes & wordplay

Rhymes with untiring

All rhymes →
Cite this entry
APA

untiring. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/untiring

MLA

“untiring.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/untiring. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “untiring,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/untiring.

Source: untiring on Wiktionary, CC BY-SA 4.0.