ae də maen tin [or] ae də maen tihn
1. made of, resembling, or having the hardness of adamant*.
2. firmly decided or fixed; unyielding; adamant.
It was fruitless to plead with someone known for his adamantine will.
ae də mənt
unlikely to change in response to any request or argument; firmly decided or fixed; unyielding.
He was adamant in his refusal to join any political party.
1. a legendary stone of great hardness.
2. any extremely hard, unbreakable, or impenetrable substance.