Translation guide
Describes something unbreakable, extremely hard, or having a diamond-like luster. In Japanese, this is expressed through metaphors, adjectives, and descriptive phrases rather than a single direct equivalent.
Describing something that cannot be broken, is very hard, or is extremely resilient, often in a figurative sense (e.g., will, resolve, material).
A Buddhist term meaning 'indestructible like a diamond', used figuratively for unbreakable resolve or truth.
His adamantine conviction cannot be shaken by anyone.
Means 'indestructible' or 'unbreakable', often used in compounds or formal contexts.
an adamantine fortress
Literally 'hard as diamond', a common simile for extreme hardness.
This material is adamantine.
Means 'solid', 'firm', or 'sturdy', used for both physical and abstract strength.
adamantine will
Means 'tough' or 'tenacious', often used for mental or physical resilience.
adamantine mental strength
Describing a surface that shines or sparkles like a diamond.
Literally 'having adamantine luster', a direct but somewhat technical description.
The gem has an adamantine surface.
A common simile for a diamond-like sparkle.
Describing someone or something that is stubbornly unyielding, often in a negative sense.
There is no single Japanese word that covers all nuances of 'adamantine'. Using a direct translation like アダマンティン is not natural. Choose an expression based on the specific meaning you want to convey.
For abstract concepts like 'adamantine will', 金剛不壊 or 堅固 are good choices. For physical hardness, use similes with ダイヤモンド.
a surface with an adamantine sparkle
彼女は強情で、自分の意見を曲げない。
She is adamantine and never bends her opinions.