obstinate
US /ˈɑːb.stə.nət/
UK /ˈɑːb.stə.nət/
1.
stubbornly refusing to change one's opinion or chosen course of action, despite attempts to persuade one to do so
:
•
He was obstinate in his refusal to admit he was wrong.
•
The child was obstinate and refused to eat his vegetables.