1. uncertain
2. incertain, ambivalent, doubtful, dubious, groping, hesitant, uncertain
3. indefinite, up in the air, indeterminate, undetermined, unsealed
4. insecure
5. uncertain
6. chancy, fluky, flukey, iffy, contingent, up in the air, unpredictable, changeable
7. unsettled, variable, unsure
8. insecure, unsafe, unreliable
9. ambiguous