adamant

The story

1. Ancient Greek · derived fromἀδάμαντ-“invincible”
2. Latin · derived fromadamantem
3. Middle English · inherited fromadamant
4. English todayadamant

From Middle English adamant, adamaunt, from Latin adamantem, accusative singular form of adamās (“hard as steel”), from Ancient Greek ἀδάμαντ- (adámant-, “invincible”), oblique stem of ἀδάμας (adámas). Doublet of diamond.

Words from the same roots