uncertain

Etymology

From Middle English uncerteyn; equivalent to un- + certain.

adj

  1. Not certain; unsure.
  2. Not known for certain; questionable.
    Tomorrow's weather is uncertain.
  3. Not yet determined; undecided.
  4. Variable and subject to change.
  5. Fitful or unsteady.
  6. Unpredictable or capricious.

noun

  1. (with "the") Something uncertain.
    Thinking about the uncertain refines our perception of the certain, and generally this takes place in a framework in which the uncertain is the future and the certain is the present. 2011, John Lyons, The Phantom of Chance: From Fortune to Randomness in Seventeenth-Century French Literature

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