adamant
adjective
- 1
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"- W.Churchill
noun
- 1
very hard native crystalline carbon valued as a gem
Also useful for “adamant”:Unscrambler— Rearrange the letters in “adamant”