Learn how to say Adamant correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word adamant:
refusing to be persuaded or to change one’s mind:
he is adamant that he is not going to resign
[mass noun] archaic
a legendary rock or mineral to which many properties were attributed, formerly associated with diamond or lodestone.
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