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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.

But it doesn’t fly without an actor of Seyfried’s caliber, who can summon unpredictable mayhem from her fingertips.

From Los Angeles Times

Flu is unpredictable, a lull can be followed by another surge.

From BBC

With movie screens across the country going dark and the theatrical exhibition industry hobbled by a series of unpredictable obstacles, many independent movie theaters are barely scraping by.

From Salon

Such mixing could reshape seasonal influenza, triggering "chaotic and unpredictable seasonal epidemics".

From BBC

"I'm really enjoying watching my team play. The fact the players can adjust to different systems is really important. We can be more unpredictable."

From BBC