The quality or state of being stubbornly inflexible:
die-hardism, grimness, implacability, implacableness, incompliance, incompliancy, inexorability, inexorableness, inflexibility, intransigence, intransigency, obduracy, obdurateness, relentlessness, remorselessness, rigidity, rigidness, stubbornness. See resist
Learn more about inflexibleness