I. ˈadəmənt also -ˌmant or -ˌmaa(ə)nt noun
( -s )
Etymology: Middle English, a fabulous mineral, diamond, lodestone, from Old French, from Latin adamant-, adamas hardest iron or steel, diamond, from Greek
1. : an imaginary stone of impenetrable hardness — formerly used of the diamond and other substances of extreme hardness
2. : an unbreakable or extremely hard substance
she became as rigid as adamant — J.C.Powys
the sharp adamant of fate — Thomas Carlyle
II. adjective
: unshakable or immovable especially in opposition : adamantine
adamant against any … game on Sunday — Archibald Marshall
: inflexible or insistent especially in maintaining a position or opinion
was adamant that he was fit to go — Nevil Shute
• ad·a·mant·ly adverb