[verb in-doo-reyt, -dyoo-; adjective in-doo-rit, -dyoo-; in-doo r-it, -dyoo r-]

verb (used with object), in·du·rat·ed, in·du·rat·ing.

verb (used without object), in·du·rat·ed, in·du·rat·ing.

to become hard; harden.
to become established or confirmed.


hardened; unfeeling; callous; inured.

Origin of indurate

1375–1425; late Middle English indurat < Latin indūrātus past participle of indūrāre to harden. See in-2, dure1, -ate1
Related formsnon·in·du·rat·ed, adjectivesem·i-in·du·rate, adjectivesem·i-in·du·rat·ed, adjectiveun·in·du·rate, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for indurate

Contemporary Examples of indurate

Historical Examples of indurate

  • Imogen was deaf to their expostulations, and indurate and callous as adamant to their persuasions.


    William Godwin

  • Stark and indurate like an Adirondack meadow enameled with trap rock, he plodded rigidly on.

  • Can we consistently blame her if she becomes callous, when every legal provision directly tends to indurate her sensibilities?

  • Underneath these coherent and indurate ledges the most valuble ores exist, but coal and fossils are searched for in vain.

  • Even where there is no plastering, the tattooing may be found to indurate the skin, and to render it less sensible to cold.

British Dictionary definitions for indurate


verb (ˈɪndjʊˌreɪt)

to make or become hard or callous
to make or become hardy

adjective (ˈɪndjʊrɪt)

hardened, callous, or unfeeling
Derived Formsinduration, nounindurative, adjective

Word Origin for indurate

C16: from Latin indūrāre to make hard; see endure
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for indurate

1530s, from Latin induratus, past participle of indurare "to make hard, harden" (see endure). Related: Indurated.

Online Etymology Dictionary, © 2010 Douglas Harper