名詞 adamant:

1. very hard native crystalline carbon valued as a gem
   同義詞：diamond

形容詞 adamant:

1. impervious to pleas, persuasion, requests, reason
   同義詞：adamantine, inexorable, intransigent

1. He was adamant in his refusal.
   他拒絕之意極堅持。
2. I've tried to persuade him to change his mind but he's adamant.
   我竭力勸他改變主意，但他毫不動搖。
3. She was quite adamant that she would not come.
   她堅決不來。
4. On this point I am adamant.
   在這一點上我是堅定不移的。