[syn: callous, indurate, pachydermatous]
The Collaborative International Dictionary of English v.0.48:
Indurate \In"du*rate\, a. [L. induratus, p. p. of indurare to
   harden. See Endure.]
   [1913 Webster]
   1. Hardened; not soft; indurated. --Tyndale.
      [1913 Webster]
   2. Without sensibility; unfeeling; obdurate.
      [1913 Webster]
The Collaborative International Dictionary of English v.0.48:
Indurate \In"du*rate\, v. t. [imp. & p. p. Indurated; p. pr. &
   vb. n. Indurating.]
   [1913 Webster]
   1. To make hard; as, extreme heat indurates clay; some
      fossils are indurated by exposure to the air.
      [1913 Webster]
   2. To make unfeeling; to deprive of sensibility; to render
      obdurate.
      [1913 Webster]
The Collaborative International Dictionary of English v.0.48:
Indurate \In"du*rate\, v. i.
   To grow hard; to harden, or become hard; as, clay indurates
   by drying, and by heat.
   [1913 Webster]
WordNet (r) 3.0 (2006):
indurate
    adj 1: emotionally hardened; "a callous indifference to
           suffering"; "cold-blooded and indurate to public opinion"
           [syn: callous, indurate, pachydermatous]
    v 1: become fixed or established; "indurated customs"
    2: make hard or harder; "The cold hardened the butter" [syn:
       harden, indurate] [ant: soften]
    3: become hard or harder; "The wax hardened" [syn: harden,
       indurate] [ant: soften]
    4: cause to accept or become hardened to; habituate; "He was
       inured to the cold" [syn: inure, harden, indurate]
Moby Thesaurus II by Grady Ward, 1.0:
49 Moby Thesaurus words for "indurate":
   anneal, backed, brutalize, cake, calcified, calcify, callous,
   calloused, case harden, case-hardened, concrete, congeal, cornify,
   crusted, crusty, crystallized, dry, firm, fossilize, fossilized,
   granulated, harden, hardened, hornified, incrusted, indurated,
   inure, lapidified, lapidify, lithify, ossified, ossify, petrified,
   petrify, reinforced, rigidified, sclerotic, set, solidified,
   solidify, steel, steeled, stiffened, strengthened, temper, toughen,
   toughened, vitrified, vitrify