Webster's Revised Unabridged Dictionary · 1913

Indurate

Indurate , adjective

[Latin induratus, past participle of indurare to harden. See Endure.]

1.
Hardened; not soft; indurated. — Tyndale
2.
Without sensibility; unfeeling; obdurate.

Indurate , transitive verb

1.
To make hard; as, extreme heat indurates clay; some fossils are indurated by exposure to the air.
2.
To make unfeeling; to deprive of sensibility; to render obdurate.

Indurate , intransitive verb

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