very hard native crystalline carbon valued as a gem
Adjective:
impervious to pleas, persuasion, requests, reason;
"he is adamant in his refusal to change his mind"
"Cynthia was inexorable; she would have none of him"
"an intransigent conservative opposed to every liberal tendency"
例句
用作形容词 (adj.)
She was quite adamant that she would not come. 她坚决不来。
On this point I am adamant. 在这一点上我是坚定不移的。
She was adamant in refusing to comply with his wishes. 她固执地拒绝按他的意愿办。