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[ih-myoo-tuh-buh l] /ɪˈmyu tə bəl/
not mutable; unchangeable; changeless.
Origin of immutable
late Middle English
1375-1425; late Middle English < Latin immūtābilis. See im-2, mutable
Related forms
immutability, immutableness, noun
immutably, adverb Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for immutable
  • Scientists once believed that long-term memories were immutable.
  • Physics is an exacting science, bound by immutable laws that are true throughout our universe.
  • The outer sphere of fixed stars was retained and held to be immutable.
  • More and more of life dripped down beneath him, reduced by the immutable laws and relaxed habits of the animal kingdom.
  • It was part of the air he breathed, the ether through which he moved, the single immutable element in his life.
  • Bush entirely subscribed to his parents' and grandparents' view of absolute and immutable values, of privilege balanced by duty.
British Dictionary definitions for immutable


unchanging through time; unalterable; ageless: immutable laws
Derived Forms
immutability, immutableness, noun
immutably, adverb
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
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Word Origin and History for immutable

early 15c., from Old French immutable and directly from Latin immutabilis "unchangeable," from assimilated form of in- "not, opposite of" (see in- (1)) + mutabilis "changeable," from mutare "to change" (see mutable). Related: Immutably.

Online Etymology Dictionary, © 2010 Douglas Harper
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