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not consistent or dependable; "an uncertain recollection of events"; "a gun with a rather uncertain trigger"
not established or confirmed; "his doom is as yet unsealed"
subject to change; "a changeable climate"; "the weather is uncertain"; "unsettled weather with rain and hail and sunshine coming one right after the other"
ambiguous (especially in the negative); "she spoke in no uncertain terms"
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"
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"
not certain to occur; not inevitable; "everything is un