n. 金刚硼

[医] 釉质的

1. consisting of or having the hardness of adamant

<adj.pert>

2. having the hardness of a diamond

<adj.all>

3. impervious to pleas, persuasion, requests, reason

<adj.all>
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