1. [ adjective ] not capable of being swayed or diverted from a course; unsusceptible to persuasion
Synonyms: inexorable intransigent adamantine

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

Related terms: inflexible
2. [ noun ] (chemistry) very hard native crystalline carbon valued as a gem
Synonyms: diamond
Related terms: carbon transparent_gem carbonado
Similar spelling:   adamantly