- obdurate
- n1. unyielding, unbending, inflexible, unmalleable; hard, obstinate, stubborn, willful, per-vicacious; recalcitrant, intractable, immovable; bull-headed, pigheaded, mulish; callous, hardened, unim-pressible, uninfluenced, case-hardened; opinionated, headstrong, bigoted.2. cruel, fell, grim, ruthless, merciless, pitiless, hardhearted; steely, adamantine, flinty, harsh, coldblooded; relentless, remorseless, implacable, inexorable, unrelenting, tough, dogged; inhuman, heartless, untouched, impervious, uncaring; unresponsive, unforgiving, unsparing, uncompassionate, unsympathetic, supercilious, unconcerned; insensible, cold-hearted, cold, unfeeling, indurate, insensitive.3. impenitent, unregenerate, reprobate, uncontrite; shameless, unrepenting, profligate; atheistic, godless, infidel, sinful.
A Note on the Style of the synonym finder. 2014.