indefatigable Definition

tireless, unflagging, energetic, unwearying, untiring, tenacious, assiduous, unstinting, unfailing, unwavering, relentless, unswerving, ceaseless, unrelenting, unflinching, steadfast, diligent, unceasing, unremitting, incessant, abiding, persistent, strenuous, constant, consistent, sustained, infatigable, indomitable, irrepressible, redoubtable, fearless, dauntless, ardent, intrepid, industrious, unyielding, unflappable, implacable, inveterate, admirable, stalwart, inexhaustible, unfaltering, fervent, resolute, zealous, pugnacious, resourceful, feisty, perseverant, prodigious, uncompromising, unabashed, selfless, plucky, pertinacious, ferocious, ebullient, doughty, peerless, nonpareil, voluble, peripatetic, wily, stakhanovite, genial, inimitable, garrulous, imperturbable, ageless, enterprising, irascible, effervescent, undying, steely, unerring, quixotic, adroit, uncomplaining, imperious, octogenarian, farseeing, impish, charismatic, erudite, eloquent, incorrigible, affable, sprightly, canny, amiable, dutiful, unassuming, crusading, oleaginous, astute, stouthearted, iconoclastic, estimable, protean,