uncertain uncertain /ənˈsɝːtən/

adjective

1. () Lacking or indicating lack of confidence or assurance  ( unsure , incertain [Non-standard] , uncertain )
   lacking or indicating lack of confidence or assurance
    Uncertain of his convictions
   uncertain of his convictions
    Unsure of himself and his future
   unsure of himself and his future
    Moving with uncertain (or unsure) steps
   moving with uncertain (or unsure) steps
    An uncertain smile
   an uncertain smile
    Touched the ornaments with uncertain fingers
   touched the ornaments with uncertain fingers
   
2. () Not established beyond doubt; still undecided or unknown  ( uncertain )
   not established beyond doubt; still undecided or unknown
    An uncertain future
   an uncertain future
    A manuscript of uncertain origin
   a manuscript of uncertain origin
    Plans are still uncertain
   plans are still uncertain
    Changes of great if uncertain consequences
   changes of great if uncertain consequences
    Without further evidence his story must remain uncertain
   without further evidence his story must remain uncertain
   
3. Ambiguous (especially in the negative)  ( uncertain )
   ambiguous (especially in the negative)
    She spoke in no uncertain terms
   she spoke in no uncertain terms
   
4. Not certain to occur; not inevitable  ( uncertain )
   not certain to occur; not inevitable
    Everything is uncertain about the army
   everything is uncertain about the army
    The issue is uncertain
   the issue is uncertain
   
5. Not consistent or dependable  ( uncertain )
   not consistent or dependable
    An uncertain recollection of events
   an uncertain recollection of events
    A gun with a rather uncertain trigger
   a gun with a rather uncertain trigger
   
6. Not established or confirmed  ( uncertain , unsealed )
   not established or confirmed
    His doom is as yet unsealed
   his doom is as yet unsealed
   
7. Subject to change  ( changeable , uncertain , unsettled )
   subject to change
    A changeable climate
   a changeable climate
    The weather is uncertain
   the weather is uncertain
    Unsettled weather with rain and hail and sunshine coming one right after the other
   unsettled weather with rain and hail and sunshine coming one right after the other