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unpredictable - definition and synonyms

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adjective     unpredictable pronunciation in American English
  1. changing often, in a way that is impossible to prepare for

    The weather here is really unpredictable.

    1. a.
      used about a person or their behavior

      The men in this prison are unpredictable, violent, and dangerous.

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Open Dictionary

snap election

a general election … that is called earlier than expected

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