Definition of unpredictable in English:

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unpredictable

Pronunciation: /ʌnprɪˈdɪktəb(ə)l/

adjective

Not able to be predicted; changeable: the unpredictable weather of the Scottish islands
More example sentences
  • People who want to think ahead need to recognise that the world predictably changes in unpredictable ways.
  • In addition, an unpredictable change in franchise agreements in the summer could delay the work even further.
  • The brown cloud shows man's activities are making climate change more unpredictable everywhere.
Synonyms
unforeseeable, undivinable, incalculable, uncertain, unsure, doubtful, dubious, in the balance, up in the air, random, arbitrary
informal iffy, hit and miss
erratic, moody, volatile, unstable, fickle, capricious, whimsical, temperamental, mercurial, changeable, variable, inconstant, undependable, unreliable, unmanageable, impulsive
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