- hardheaded, mulish - unreasonably rigid in the face of argument or entreaty or attack
Antonym: docile (indirect, via stubborn)
- hardheaded, hard-nosed, practical, pragmatic - 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"
Antonym: unrealistic (indirect, via realistic)