Adjective: hardheaded 'haa(r)d'he-did
- Unreasonably rigid in the face of argument, entreaty or attack
"I wish you knew how hardheaded, reluctant, my love for you is";
- mulish
- Guided by practical experience and observation rather than theory
"a hardheaded appraisal of our position";
- hard-nosed, practical, pragmatic
See also: obstinate, realistic, stubborn, unregenerate