steely Synonyms

pewtery steadfast steel stern stiff stony strong strong-minded stubborn solid slaty pitiless relentless resolute rigid ruthless severe silvered single-minded toned tough unbending blue-grey unwavering unbreakable unswerving strong-willed rocklike rock-ribbed unsmiling blue-gray lead-colored uncompromising unfeeling unflexible unrelenting unyielding unadaptable creaky dead set unstoppable pewter adamant determined dogged dour dure ferric ferrous firm