1. capable of being extended or shaped by hammering or by pressure from rollers.
  2. adaptable or tractable: the malleable mind of a child.

Origin of malleable

1350–1400; Middle English malliable < Medieval Latin malleābilis, equivalent to malle(āre) to hammer (derivative of Latin malleus hammer) + -ābilis -able
Related formsmal·le·a·bly, adverbmal·le·a·bil·i·ty, mal·le·a·ble·ness, nounnon·mal·le·a·ble, adjectiveun·mal·le·a·ble, adjective

Synonyms for malleable

Antonyms for malleable Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for unmalleable

Historical Examples of unmalleable

British Dictionary definitions for unmalleable


  1. (esp of metal) able to be worked, hammered, or shaped under pressure or blows without breaking
  2. able to be influenced; pliable or tractable
Derived Formsmalleability or rare malleableness, nounmalleably, adverb

Word Origin for malleable

C14: via Old French from Medieval Latin malleābilis, from Latin malleus hammer
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 unmalleable



late 14c., "capable of being shaped by hammering," from Middle French malleable and directly from Medieval Latin malleabilis, from malleare "to beat with a hammer," from Latin malleus "hammer" (see mallet). Figurative sense, of persons, "capable of being adapted" first recorded 1610s.

Online Etymology Dictionary, © 2010 Douglas Harper

unmalleable in Medicine


  1. Capable of being shaped or formed, as by hammering or pressure.
  2. Easily controlled or influenced; tractable.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

unmalleable in Science


  1. Capable of great deformation without breaking, when subject to compressive stress. Gold is the most malleable metal. Compare ductile.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.