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indefatigable

   Also found in: Wikipedia 0.01 sec.
in·de·fat·i·ga·ble  (nd-ft-g-bl)
adj.
Incapable or seemingly incapable of being fatigued; tireless. See Synonyms at tireless.
[Obsolete French indéfatigable, from Latin indfatgbilis : in-, not; see in-1 + dfatgre, to tire out (d-, intensive pref.; see de- + fatgre, to weary).]
inde·fati·ga·bili·ty, inde·fati·ga·ble·ness n.
inde·fati·ga·bly adv.
indefatigable
Adjective
never getting tired or giving up: Mitterrand was an indefatigable organizer [Latin in- not + fatigare to tire]
indefatigably adv
ThesaurusLegend:  Synonyms Related Words Antonyms
Adj.1.indefatigableindefatigable - showing sustained enthusiastic action with unflagging vitality; "an indefatigable advocate of equal rights"; "a tireless worker"; "unflagging pursuit of excellence"
tireless, unflagging, unwearying
energetic - possessing or exerting or displaying energy; "an energetic fund raiser for the college"; "an energetic group of hikers"; "it caused an energetic chemical reaction"
indefatigable
adjective tireless, dogged, persevering, patient, relentless, diligent, inexhaustible, unremitting, assiduous, unflagging, untiring, sedulous, pertinacious, unwearying, unwearied
Translations
Spanish indefatigable [ɪndɪˈfætɪgəbl] adj → incansable, infatigable
French indefatigable [ɪndɪˈfætɪgəbl] adj → infatigable
German indefatigable [ɪndɪˈfætɪgəbl] adj → unermüdlich
Italian indefatigable [ɪndɪˈfætɪgəbl] adj → infaticabile, instancabile
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? Mentioned in ? References in classic literature
 
He knew him to be proud and ill-natured; he also knew that his divinity itself was tinctured with his temper, and such as in many respects he himself did by no means approve; but he was at the same time an excellent scholar, and most indefatigable in teaching the two lads.
The History of Tom Jones, a Foundling by Fielding, Henry View in context
Chief among those who did this fetching and carrying was Captain Bildad's sister, a lean old lady of a most determined and indefatigable spirit, but withal very kindhearted, who seemed resolved that, if she could help it, nothing should be found wanting in the Pequod, after once fairly getting to sea.
Moby Dick I-LXVII by Melville, Herman View in context
All night long the Martians were hammering and stirring, sleepless, indefatigable, at work upon the machines they were making ready, and ever and again a puff of greenish- white smoke whirled up to the starlit sky.
The War Of The Worlds by Wells, H.G. View in context
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