indurate

To make hard; harden.

To inure, as to hardship or ridicule.

To make callous or obdurate.

To grow hard; harden.

To become firmly fixed or established.

Hardened; obstinate; unfeeling.

Hardened; unfeeling; indurated.

To grow hard; harden; become hard: as, clay indurates by drying and by extreme heat.

To become fixed or habitual; pass into use; inure.

To make hard: as, extreme heat indurates clay.