[ˈadəm(ə)nt], (Adjective)

Definitions:
- refusing to be persuaded or to change one's mind
(e.g: he is adamant that he is not going to resign)


Phrases:

Origin:
Old English (as a noun), from Old French adamaunt-, via Latin from Greek adamas, adamant-, ‘untameable, invincible’ (later used to denote the hardest metal or stone, hence diamond), from a- ‘not’ + daman ‘to tame’. The phrase to be adamant dates from the 1930s, although adjectival use had been implied in such collocations as ‘an adamant heart’ since the 16th century

[ˈadəm(ə)nt], (Noun)

Definitions:
- a legendary rock or mineral to which many properties were attributed, formerly associated with diamond or lodestone


Phrases:

Origin:
Old English (as a noun), from Old French adamaunt-, via Latin from Greek adamas, adamant-, ‘untameable, invincible’ (later used to denote the hardest metal or stone, hence diamond), from a- ‘not’ + daman ‘to tame’. The phrase to be adamant dates from the 1930s, although adjectival use had been implied in such collocations as ‘an adamant heart’ since the 16th century