unpredictable

[ uhn-pri-dik-tuh-buhl ]
/ ˌʌn prɪˈdɪk tə bəl /

adjective

not predictable; not to be foreseen or foretold: an unpredictable occurrence.

noun

something that is unpredictable: the unpredictables of life.

Origin of unpredictable

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

SYNONYMS FOR unpredictable

Related forms

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. 2019

British Dictionary definitions for unpredictableness

unpredictable

/ (ˌʌnprɪˈdɪktəbəl) /

adjective

not capable of being predicted; changeable

Derived Forms

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