Synonyms for uncertain

modified

1. Doubtful in mind

   dubious, undecided, in a quandary; see doubtful 2.

2. Not determined

   undecided, undetermined, unsettled, doubtful, changeable, unpredictable, improbable, unlikely, unfixed, unsure, indeterminate, haphazard, random, chance, casual, provisional, contingent, alterable, fluctuant, subject to change, possible, vague, conjectural, questionable, problematic, suppositional, suppositious, hypothetical, theoretical, open to question, equivocal, perplexing, debatable, dubious indefinite, unascertained, ambiguous, unresolved, debated, conjecturable, unknown, unannounced, imprecise, up in the air, in doubt, in abeyance, still in debate, on the knees of the Gods*.