(said of people and their conviction) Firm; unshakeable; unyielding; determined. / (of an object) Very difficult to break, pierce, or cut.

An imaginary rock or mineral of impenetrable hardness; a name given to the diamond and other substances of extreme hardness. / An embodiment of impregnable hardness. / (obsolete) A lodestone.

plural of adamant

Adamic

(Abrahamic religions) The first man and the progenitor of the human race. / A male given name from Hebrew. / (figuratively) Original sin or human frailty.

A surname originating as a patronymic derived from Adam. / An unincorporated community in Lake County, California. / Former name of Corte Madera, California.

plural of Adam

Of, relating to, or resembling the Biblical character Adam.

The quality of being adamant

The property of being adamant.