uncertain

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