uncertain -
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"
certain,
sure exercising or taking care great enough to bring assurance; "be certain to disconnect the iron when you are through"; "be sure to lock the doors"
ambivalent uncertain or unable to decide about what course to follow; "was ambivalent about having children"
doubtful,
dubious fraught with uncertainty or doubt; "they were doubtful that the cord would hold"; "it was doubtful whether she would be admitted"; "dubious about agreeing to go"
uncertain -
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"
certain exercising or taking care great enough to bring assurance; "be certain to disconnect the iron when you are through"; "be sure to lock the doors"
indefinite not decided or not known; "were indefinite about their plans"; "plans are indefinite"
uncertain -
not certain to occur; not inevitable; "everything is uncertain about the army"; "the issue is uncertain"
certain,
sure exercising or taking care great enough to bring assurance; "be certain to disconnect the iron when you are through"; "be sure to lock the doors"
unpredictable unknown in advance; "an unpredictable (or indeterminable) future"
flukey,
fluky,
iffy,
chancy subject to accident or chance or change; "a chancy appeal at best"; "getting that job was definitely fluky"; "a fluky wind"; "an iffy proposition"
contingent uncertain because of uncontrollable circumstances; "the results of confession were not contingent, they were certain"- George Eliot
uncertain -
not consistent or dependable; "an uncertain recollection of events"; "a gun with a rather uncertain trigger"
uncertain -
ambiguous (especially in the negative); "she spoke in no uncertain terms"
uncertain -
subject to change; "a changeable climate"; "the weather is uncertain"; "unsettled weather with rain and hail and sunshine coming one right after the other"
variable (used of a device) designed so that a property (as e.g. light) can be varied; "a variable capacitor"; "variable filters in front of the mercury xenon lights"
uncertain -
not established or confirmed; "his doom is as yet unsealed"
