Source : WordNet®

unyielding
     adj 1: stubbornly unyielding; "dogged persistence"; "dour
            determination"; "the most vocal and pertinacious of
            all the critics"; "a mind not gifted to discover truth
            but tenacious to hold it"- T.S.Eliot; "men tenacious
            of opinion" [syn: {bulldog}, {dogged}, {dour}, {pertinacious},
             {tenacious}]
     2: refusing to give way or compromise; "unyielding
        determination"
     3: having austere inflexibility; "a flinty manner"; "granitic
        morality"; "his unyielding mouth and glassy eyes"-
        Marchette Chute [syn: {flinty}, {granitic}]