Firm and unyielding in consistency; not easily broken, bent, or pierced; solid, rigid.

Like brass.

Hard. literal and figurative.

Resembling flint. Having the characteristic qualities of flint; hard, impenetrable, rugged; spec. applied to varieties of maize (cf. flint corn n. at…

Physically hardened or hard. Now rare.

Originally (Botany): constituting a shell, husk, etc. Later: of, relating to, or designating a putamen.

Made of oak wood; oaken. rare.

Resembling, or having the appearance of, marble; rigid, cold, or still like marble.

= obdurate, adj. 2. rare.

= marmoreal, adj.

Hard.

Stony (as the ‘calculary’ of a pear). Obsolete.

gen. Hard; covered with hard growths. Obsolete.

as hard as horn; also adverbial.

Resembling marble or a marble statue; cold (also smooth, white, etc.) like marble.