[uhn-awl-ter-uh-buh l]


not capable of being altered, changed, or modified.

Origin of unalterable

First recorded in 1610–15; un-1 + alterable
Related formsun·al·ter·a·ble·ness, un·al·ter·a·bil·i·ty, nounun·al·ter·a·bly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for unalterable

Contemporary Examples of unalterable

Historical Examples of unalterable

  • It crushed them with the weight of unending vastness and unalterable decree.

    White Fang

    Jack London

  • But he continued to shake his head with an air of unalterable resolution.


    Emile Zola

  • It made it easier to talk of the future she had arranged, which now was an unalterable thing.


    Joseph Conrad

  • He knew the plans of God, and had formed an unalterable opinion about all his neighbors.

    'Charge It'

    Irving Bacheller

  • The spiritual healer rose, his face set with an unalterable purpose.


    Cleveland Moffett

British Dictionary definitions for unalterable



(of a condition, truth, etc) unable to be changed or altered
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 unalterable

1610s, from un- (1) + alterable. Related: Unalterably.

Online Etymology Dictionary, © 2010 Douglas Harper