[uhn-awl-ter-uh-buh l]
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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. 2018

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British Dictionary definitions for unalterably


  1. (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 unalterably



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

Online Etymology Dictionary, © 2010 Douglas Harper