refractory Synonyms

stubborn unyielding ungovernable unruly fractious recalcitrant perverse obstinate unmanageable contumacious steadfast stiff stiff-necked strong restive resilient wild renitent substantial resisting resistant resty retardative rigid seditious restiff self-willed resistive stable tenable turbulent unalterable unadaptable noncompliant out of hand furnace lining firebrick pigheaded nonobservant undisciplined unmalleable disobedient unaccommodating uncontrollable unregenerate untoward unwilling vengeful wayward wilful