resolute
adjective formal uk/ˈrez.ə.luːt/ us/ˈrez.ə.luːt/
坚决的；有决心的；坚定的
determined in character, action, or ideas
Their resolute opposition to new working methods was difficult to overcome. 他们坚决反对新的工作方法，很难说服他们。
She's utterly resolute in her refusal to apologize. 她断然拒绝道歉。