ADAMANTINE
adamant, adamantine, inexorable, intransigent
(adjective) 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; “an intransigent conservative opposed to every liberal tendency”
adamantine
(adjective) having the hardness of a diamond
adamantine
(adjective) consisting of or having the hardness of adamant
Source: WordNet® 3.1
Etymology
Adjective
adamantine (comparative more adamantine, superlative most adamantine)
Made of adamant, or having the qualities of adamant; incapable of being broken, dissolved, or penetrated.
Like the diamond in hardness or luster.
Anagrams
• amantadine, diamantane
Source: Wiktionary
Ad`a*man"tine, a. Etym: [L. adamantinus, Gr.
1. Made of adamant, or having the qualities of adamant; incapable of
being broken, dissolved, or penetrated; as, adamantine bonds or
chains.
2. (Min.)
Definition: Like the diamond in hardness or luster.
Source: Webster’s Unabridged Dictionary 1913 Edition