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Synonyms

unpredictable

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

adjective

  1. not predictable; not to be foreseen or foretold.

    an unpredictable occurrence.

    Synonyms:
    uncertain, variable, fitful, erratic

noun

  1. something that is unpredictable.

    the unpredictables of life.

unpredictable British  
/ ˌʌnprɪˈdɪktəbəl /

adjective

  1. not capable of being predicted; changeable

"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

Other Word Forms

  • unpredictability noun
  • unpredictableness noun
  • unpredictably adverb

Etymology

Origin of unpredictable

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

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

That is to say, “I Love Boosters” is, above all else, wild, rollicking and unpredictable.

From Los Angeles Times

Following a fortnight off, Scotland's top flight returns with gameweek 30 of a season as unpredictable as it is enthralling.

From BBC

In the real world, of course, markets are unpredictable.

From MarketWatch

Although access does sometimes come back, it is unpredictable and usually for short periods.

From BBC

The company warned that unpredictable rules and lengthy legal procedures would hurt Italy's business climate, but said it would comply with its tax obligations.

From Barron's