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uncertain (EN)
adjective

adjective “uncertain”

base form uncertain (more/most)
  1. not feeling sure about something; having doubts
    She felt uncertain about which dress to wear to the party.
  2. likely to change, usually in a way that is not good
    The weather forecast is uncertain, so we might have to cancel the picnic.
  3. (of an action) feeling unsure about the result
    She gave an uncertain smile, not sure if her joke was funny.