Source : WordNet®

hardheaded
     adj 1: unreasonably rigid in the face of argument or entreaty or
            attack [syn: {mulish}]
     2: guided by practical experience and observation rather than
        theory; "a hardheaded appraisal of our position"; "a
        hard-nosed labor leader"; "completely practical in his
        approach to business"; "not ideology but pragmatic
        politics" [syn: {hard-nosed}, {practical}, {pragmatic}]