adrift afloat airborne alternating amorphous brittle capricious changeable changeful circumforaneous corruptible deciduous desultory deviable discursive divagatory dizzy drifting dying eccentric ephemeral errant erratic evanescent fading fast and loose fickle fitful fleeting flickering flighty floating fluctuating fluttering fly-by-night flying footloose footloose and fancy-free fragile frail freakish fugacious fugitive gadding giddy gliding gypsy-like gypsyish hovering impermanent impetuous impulsive inconsistent inconstant indecisive infirm insubstantial irregular irresolute irresponsible jet-propelled landloping mazy meandering mercurial migrational migratory momentary moody mortal mutable nomad nomadic nondurable nonpermanent passing perishable rambling ranging restless roaming rocket-propelled roving scatterbrained shapeless shifting shifty short-lived shuffling spasmodic spineless straggling straying strolling temporal temporary traipsing transient transitive transitory transmigratory unaccountable uncertain uncontrolled undependable undisciplined undurable unenduring unfixed unpredictable unreliable unrestrained unsettled unstable unstable as water unstaid unsteadfast unsteady vacillating vagabond vagrant variable vicissitudinary vicissitudinous volant volatile volitant wandering wanton wavering wavery wavy wayward whimsical winging wishy-washy