(1):

(a.) Without sensibility; unfeeling; obdurate.

(2):

(v. i.) To grow hard; to harden, or become hard; as, clay indurates by drying, and by heat.

(3):

(v. t.) To make unfeeling; to deprive of sensibility; to render obdurate.

(4):

(v. t.) To make hard; as, extreme heat indurates clay; some fossils are indurated by exposure to the air.

(5):

(a.) Hardened; not soft; indurated.