See more synonyms for unpredictable on Thesaurus.com
  1. something that is unpredictable: the unpredictables of life.

Origin of unpredictable

First recorded in 1855–60; un-1 + predictable
Related formsun·pre·dict·a·bil·i·ty, un·pre·dict·a·ble·ness, nounun·pre·dict·a·bly, adverb

Synonyms for unpredictable

See more synonyms for on Thesaurus.com
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for unpredictability

Contemporary Examples of unpredictability

Historical Examples of unpredictability

  • The results were instability, unpredictability, uncertainty and fear.

    After the Rain

    Sam Vaknin

  • One of the most disquieting aspects of the advance was its variability and unpredictability.

British Dictionary definitions for unpredictability


  1. not capable of being predicted; changeable
Derived Formsunpredictability or unpredictableness, noununpredictably, 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

Word Origin and History for unpredictability



1857, from un- (1) "not" + predictable. Related: Unpredictably; unpredictability.

Online Etymology Dictionary, © 2010 Douglas Harper