ETYM Latin adamantinus, Greek.
1. Consisting of or having the hardness of adamant.
2. Having the hardness of a diamond.
Unbreakable; impenetrable.
C · adamant · atomic number 6 · carbon · hard · inexorable · inflexible · intransigent · transparent gem
Adam · adamance · adamancy · adamant · adamantane · adamantine · adamantly · adamellite · adamic · adamical · adamite · adamitical · adamitism
Krut, tvrd, stabilan.