strong-willed
adjective uk/ˌstrɒŋˈwɪld/ us/ˌstrɑːŋˈwɪld/
意志坚定的；固执己见的
If you are strong-willed, you are determined to behave in a particular way although there might be good reasons for not doing so.
She's very strong-willed and if she's decided to drop out of school, nothing will stop her. 她非常有主见，如果她决定要辍学，什么也阻止不了她。
Synonym: strong-minded