adamant Synonyms

adamantine diamond intransigent inexorable steel steely stern stiff stiff-necked stony wilful strong strong-minded stubborn tenacious steadfast single-minded pertinacious pig-headed pontifical purposive quartz recalcitrant relentless resolute resolved rhomb rigid self-willed set tough unbending uncompromising brassbound pigheaded unmoving hardheaded unswerving rocklike rock-ribbed rock steady unstoppable unbendable unmalleable unreceptive unwavering bolshie unflexible unmovable unmoved