He was adamant in his refusal.
I've tried to persuade him to change his mind but he's adamant.
She was quite adamant that she would not come.
On this point I am adamant.
2. 坚定不移的; 固执的[(+about/in/to)][+(that)]
He was adamant that she should not go.
She was adamant in refusing to comply with his wishes.