uncertain

(a) lacking or indicating lack of confidence or assurance
- uncertain of his convictions
- unsure of himself and his future
- moving with uncertain (or unsure) steps
- an uncertain smile
- touched the ornaments with uncertain fingers
incertain, unsure,
(a) not established beyond doubt; still undecided or unknown
- an uncertain future
- a manuscript of uncertain origin
- plans are still uncertain
- changes of great if uncertain consequences
- without further evidence his story must remain uncertain
(a) not established or confirmed
- his doom is as yet unsealed
unsealed,
(a) not certain to occur; not inevitable
- everything is uncertain about the army
- the issue is uncertain
(s) subject to change
- a changeable climate
- the weather is uncertain
- unsettled weather with rain and hail and sunshine coming one right after the other
changeable, unsettled,
(s) not consistent or dependable
- an uncertain recollection of events
- a gun with a rather uncertain trigger
(s) ambiguous (especially in the negative)
- she spoke in no uncertain terms

incertain unsure unsealed changeable unsettled

sure certain sealed

uncertainly uncertainness uncertainty uncertainty principle