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.
...a hard-headed and shrewd businesswoman...
= tough
ADJ
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.
...a hard-headed and shrewd businesswoman...
= tough
ADJ
Collins COBUILD Advanced Learner's English Dictionary. Английский словарь Коллинз COBUILD для изучающих язык на продвинутом уровне. 2006