Try Our Apps


Avoid these words. Seriously.


[ih-myoo-tuh-buh l] /ɪˈmyu tə bəl/
not mutable; unchangeable; changeless.
Origin of immutable
late Middle English
First recorded in 1375-1425; late Middle English word from Latin word immūtābilis. See im-2, mutable
Related forms
immutability, immutableness, noun
immutably, adverb Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
Cite This Source
Examples from the Web for immutable
Contemporary Examples
Historical Examples
  • The answer of the son came with an immutable finality, the sublime faith of love.

    Within the Law Marvin Dana
  • How could you believe him constant and immutable, after what happened to me?

    The Memoirs of Madame de Montespan, Complete Madame La Marquise De Montespan
  • But those who see the absolute and eternal and immutable may be said to know, and not to have opinion only?

    The Republic Plato
  • That is immutable; you may trust your soul to that; but you must be certain first of your quantities.

  • These laws are as immutable as Newton's laws, and come, like his, from beyond our ken.

    The Soul of a People H. Fielding
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
Cite This Source
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
Cite This Source

Word of the Day

Nearby words for immutable

Word Value for immutable

Scrabble Words With Friends