unbending Synonyms

inflexible rigid resolute resolved ruthless self-willed set severe single-minded remorseless obdurate relentless obstinate offish ossified outlustre pertinacious perverse pig-headed relaxation steadfast steely unshakable unyielding unwavering unswerving strong-willed iron-willed unbendable uncompliant unrelenting unflinching uncompromising stern stiff stiff-necked strait strict strong-minded stubborn tough unshakeable adamant ferrous firm fixed flinty grim grinner hard