You use hard-headed to describe someone who is practical and determined to get what they want or need, and who does not allow emotions to affect their actions.
例句
...a hard-headed and shrewd businesswoman...務實、精明的女商人They are taking a hard-headed commercial decision.他們正在作出一項清醒冷靜的商業決策。
英漢詞典釋義
adj.
(尤指在做生意時)精明的,講究實際的;不感情用事的
a hardheaded appraisal of the position對所處形勢的實際估計hardheaded intelligence冷靜的智慧
英英詞典釋義
Adjective
1. unreasonably rigid in the face of argument or entreaty or attack
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"