- consisting of or having the hardness of adamant
- having the hardness of a diamond
- 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"
- It is adamantine for Chinese to safeguard homeland integrity.
To count them all, demands..A throat of brass, and adamantine lungs.出自：Pope
An adamantine will for success.出自：C. P. Snow