uncertain

adjective

1. lacking or indicating lack of confidence or assurance"uncertain of his convictions"
2. not established beyond doubt; still undecided or unknown"an uncertain future"
3. not established or confirmed"his doom is as yet unsealed"
4. not certain to occur; not inevitable"everything is uncertain about the army"
5. subject to change"a changeable climate"
6. not consistent or dependable"an uncertain recollection of events"
7. ambiguous (especially in the negative)"she spoke in no uncertain terms"