"hardheaded" in the adjective sense
1. hardheaded, mulish
unreasonably rigid in the face of argument or entreaty or attack
2. 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"
Source: WordNet® (An amazing lexical database of English)
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