uncertain

ambiguous ambivalent apprehensive approximate arguable bewildered borderline casual changeable chancy changing circumstantial clouded conditional conjectural contingent controversial debatable delicate dicey disputable disturbing doubtful doubtful dubitable dubious enigmatic/enigmatical enigmatic erratic fallible fishy flickering fluky general hairy halting hazardous hazy hesitating hypothetical improbable incalculable incomputable inconclusive inconstant inconsistent incredulous indefinite inexplicit intangible irresolute irregular leery lukewarm measureless mootable moot more erratic more enigmatic more enigmatic more enigmatical more possible more open most enigmatical most enigmatic most enigmatic most possible nebulous on the fence opaque open perilous perplexed perturbing possible precarious problematical problematical problematic provisory queasy reluctant risky rocky rough roughest rougher self-conscious shaky spasmodic speculative stumped suspect suspected suspicious temperamental tenebrous ticklish torn tottering tottery touch-and-go troublous unanswered unapt unclear uncountable undecided undependable unforeseeable unintelligible unsafe unpredictable unreliable unsettled unsettled unsubstantiated unstablest unstablest unsure upsetting unstable unsteadiest unstable/unsteady unsteadier unstabler unstabler unsettling up in the air vague variable vacillating vacillating varying weak weak weaker weaker weak-minded weakest weakest whimsical