adamantino

Etymology
.

Adjective

 * 1) adamantine

Adjective

 * 1) adamant determined; unshakeable; unyielding

Adjective

 * 1) adamantine

Noun

 * 1) adamant a rock or mineral held by some to be of impenetrable hardness; a name given to the diamond and other substances of extreme hardness

Etymology
, from, from. .

Adjective

 * 1) adamantine