strong-willed
US /ˌstrɔŋˈwɪld/
UK /ˌstrɔŋˈwɪld/

1.
determinado, obstinado
determined to do what one wants even if other people advise against it
:
•
She is a very strong-willed person who always achieves her goals.
Ela é uma pessoa muito determinada que sempre alcança seus objetivos.
•
Despite the challenges, he remained strong-willed and never gave up.
Apesar dos desafios, ele permaneceu determinado e nunca desistiu.