'Hardens' in the Bible

“My flesh is clothed with worms and a crust of dirt,My skin hardens and runs.

when the dust hardens like cast metaland the clods of dirt stick together?

A wicked man hardens his face; but as for the upright, he establishes his ways.

Happy is the one who is always reverent,but one who hardens his heart falls into trouble.

A man who hardens his neck after much reproofWill suddenly be broken beyond remedy.