Definition of untiring:
sedulous, plodding, gumptious, tenacious, unceasing, renewed, persistent, unfailing, purposeful, unswerving, staunch, undeterred, constant, unflagging, unfailing, weariless, diligent, pertinacious, unfaltering, unwavering, resistless, ambitious, dogged, motivated, unflinching, industrious, resolute, dedicated, persevering, indomitable, continuing, driven, unstinted, tireless, unwearying, continue, firm, up-and-coming, indefatigable, competitive, durable, insistent, hardworking, unwearied, steady, strong, tired, patient, determined, continued, energetic, unremitting, unintermitted, powerful, inexhaustible, unresting, unwearied.
- "The Struggle for Missouri", John McElroy.
All alone, without a being near him to consult, his right arm struck from him by the death of Louis, with no brother left to him but the untiring and faithful John, he prepared without delay for the new task imposed upon him.- "The Rise of the Dutch Republic, Volume II.(of III) 1566-74", John Lothrop Motley Last Updated: January 25, 2009.
About an hour after sunset all our preparations were concluded, save only the Shugduf, at which the boy Mohammed still worked with untiring zeal; he wisely remembered that he had to spend in it the best portion of a week and a half.- "Personal Narrative of a Pilgrimage to Al-Madinah & Meccah", Sir Richard Francis Burton.