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unpredictable

[ uhn-pri-dik-tuh-buhl ]
/ ˌʌn prɪˈdɪk tə bəl /
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adjective
not predictable; not to be foreseen or foretold: an unpredictable occurrence.
noun
something that is unpredictable: the unpredictables of life.
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The rainy weather could not ________ my elated spirits on my graduation day.
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Origin of unpredictable

First recorded in 1855–60; un-1 + predictable

OTHER WORDS FROM unpredictable

un·pre·dict·a·bil·i·ty, un·pre·dict·a·ble·ness, nounun·pre·dict·a·bly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use unpredictable in a sentence

British Dictionary definitions for unpredictable

unpredictable
/ (ˌʌnprɪˈdɪktəbəl) /

adjective
not capable of being predicted; changeable

Derived forms of unpredictable

unpredictability 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
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