Synonyms and Antonyms of untiring
- the camel's reputation as an untiring beast of burden
- the detective's untiring investigation of the crime finally led to several arrests
assiduous, conscientious, diligent, meticulous, painstaking, sedulous
determined, dogged, patient, persevering, persistent, pertinacious, plodding, relentless, steadfast, steady, stubborn, tenacious, unabated, unfailing, unfaltering, unflinching, unrelenting, unremitting, unwavering
active, busy, dynamic, energetic, feverish, spirited, vigorous
indolent, lackadaisical, laggard, lazy, listless, shiftless, slothful, sluggish
apathetic, casual, desultory, languid, spiritless
beat, broken, burned-out (or burnt-out), done in, drained, enervated, jaded, overtaxed, overworked, played out, sapped, spent, tuckered (out), wearied, worn-out