adamant

名词 adamant:

1. very hard native crystalline carbon valued as a gem
   同义词：diamond

形容词 adamant:

1. impervious to pleas, persuasion, requests, reason
   同义词：adamantine, inexorable, intransigent

1. He was adamant in his refusal.
   他拒绝之意极坚持。
2. I've tried to persuade him to change his mind but he's adamant.
   我竭力劝他改变主意，但他毫不动摇。
3. She was quite adamant that she would not come.
   她坚决不来。
4. On this point I am adamant.
   在这一点上我是坚定不移的。