unbendable Synonyms

unshakable steadfast steady stiff unfaltering firm unwavering unrelenting uncompromising unbending tenacious stubborn strong standing pat unswayable brass-bound hanging tough unshakeable uncompliant hardheaded set in stone brassbound unyielding set rigid resolute incompliant implacable immovable grim fixed determined bovine bigoted adamantine inelastic inexorable inflexible resistant relentless pig-headed pertinacious obstinate obdurate iron intransigent insistent adamant