adamant has definitions from the field of chemistry
1
[ adjective ] not capable of being swayed or diverted from a course; unsusceptible to persuasion

Examples

"he is adamant in his refusal to change his mind" "Cynthia was inexorable she would have none of him"- W.Churchil

Used in print

(The Dallas Morning News,...)

Committee approval of Gov._Price_Daniel 's `` abandoned property '' act seemed certain Thursday despite the adamant protests of Texas bankers .

(Arthur Miller, "The Prophecy," in The Best...)

But just when she seemed to have sunk into some depravity of peasanthood she would disappear and come_down bathed , brushed , and taking_breaths of air , and even with her broken nails her hands would come to rest on a table or a leaf with a thoughtless delicacy , a grace of history , so_to_speak , and for an instant one saw how ferociously proud she was and adamant on certain questions of personal value .

Related terms

inflexible

2
[ noun ] (chemistry) very hard native crystalline carbon valued as a gem

Synonyms

diamond

*