I. ˈin-də-rət, -dyə-; in-ˈdu̇r-ət, -ˈdyu̇r- adjective
Date: 14th century
: physically or morally hardened
II. ˈin-də-ˌrāt, -dyə- verb
( -rat·ed ; -rat·ing )
Etymology: Latin induratus, past participle of indurare, from in- + durare to harden, from durus hard — more at during
Date: 1538
transitive verb
1. : to make unfeeling, stubborn, or obdurate
2. : to make hardy : inure
3. : to make hard
great heat indurate s clay
4. : to establish firmly : confirm
intransitive verb
1. : to grow hard : harden
2. : to become established