uncertain - definition and synonyms

 
 
adjective 

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/ʌnˈsɜː(r)t(ə)n/
  1. 1
    not clearly known or understood

    The origin of the word is uncertain.

    it is uncertain whether/why/how etc:

    It is uncertain how they entered the property.

    remain uncertain:

    Despite recent research, the precise mechanism of the virus remains uncertain.

    1. a.
      likely to change and become worse

      The economic outlook was beginning to look uncertain.

      uncertain future:

      The industry as a whole faces a very uncertain future.

  2. 2
    not feeling sure about what to do, whether something is true etc
    uncertain about/of:

    I left the meeting feeling anxious, and uncertain about what to do next.

    uncertain what/why/how etc:

    Greg was uncertain how to respond to this odd request.

derived word