Source : Webster's Revised Unabridged Dictionary (1913)

Indurate \In"du*rate\, a. [L. induratus, p. p. of indurare to
   harden. See {Endure}.]
   1. Hardened; not soft; indurated. --Tyndale.

   2. Without sensibility; unfeeling; obdurate.

Indurate \In"du*rate\, v. t. [imp. & p. p. {Indurated}; p. pr. &
   vb. n. {Indurating}.]
   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 \In"du*rate\, v. i.
   To grow hard; to harden, or become hard; as, clay indurates
   by drying, and by heat.

Source : WordNet®

indurate
     adj : emotionally hardened; "a callous indifference to suffering";
           "cold-blooded and indurate to public opinion" [syn: {callous},
            {thick-skinned}, {pachydermatous}]

indurate
     v 1: become fixed or established; "indurated customs"
     2: make hard or harder; "The cold hardened the butter" [syn: {harden}]
        [ant: {soften}]
     3: become hard or harder; "The wax hardened" [syn: {harden}]
        [ant: {soften}]
     4: cause to accept or become hardened to; habituate; "He was
        inured to the cold" [syn: {inure}, {harden}]