accidental adrift adventitious afloat agnostic aleatory alternating ambiguous amorphous capricious casual causeless chance chancy changeable changeful contingent coquettish destinal desultory deviable dicey dizzy doubtful doubting dubious eccentric equivocal erratic extraordinary faddish fast and loose fatal fatidic fickle fitful flickering flighty flirtatious flitting fluctuant fluctuating fluky fortuitous freakish giddy hesitant hesitating iffy impetuous improbable impulsive incalculable incidental inconsistent inconstant indecisive indemonstrable indeterminate infirm insecure irregular irresolute irresponsible light mazy mercurial moody more than expected out-of-the-way past expectation polysemous quicksilver rambling restless risky rocky roving scatterbrained shaky shapeless shifting shifty shuffling skeptical skittish spasmodic spineless sudden tottery touch-and-go toying treacherous unaccountable unannounced unanticipated uncaused uncertain unconfirmable uncontrolled unconvinced undependable undetermined undisciplined undivinable undivined unexpected unfixed unforeseeable unforeseen unguessed unhealthy unheralded unhoped for unlooked-for unpersuaded unpredicted unprepared for unprovable unreliable unrestrained unsafe unsettled unsound unstable unstable as water unstaid unsteadfast unsteady unsure untrustworthy unverifiable vacillating vagrant variable versatile vicissitudinary vicissitudinous volatile wandering wanton wavering wavery wavy wayward whimsical wishy-washy without warning