(imp. & p. p.) of Steel.

Philistine backed calcified callous calloused case-hardened crusted crusty crystallized flinty fossilized granulated hard hardened hardhearted hornified impervious incrusted indurate indurated insensitive inured lapidified ossified pachydermatous petrified proof against reinforced rigidified sclerotic set solidified steeled against steely stiffened stony strengthened thick-skinned toughened vitrified