Meaning of ADAMANT in English

ADAMANT

n.

Pronunciation: ' a-d ə -m ə nt, - ˌ mant

Function: noun

Etymology: Middle English, from Anglo-French, from Latin adamant-, adamas hardest metal, diamond, from Greek

Date: 14th century

1 : a stone (as a diamond) formerly believed to be of impenetrable hardness

2 : an unbreakable or extremely hard substance

Merriam Webster Collegiate English Dictionary.      Merriam Webster - Энциклопедический словарь английского языка.