unstable Synonyms

unsteady unsound capricious precarious tottering variable erratic uncertain fluid volatile fickle fitful unreliable insecure fluctuating inconsistent wavering unpredictable changing shifting shaky wobbly rocky risky skittish short-lived unfirm shifty vicissitudinous vibratory seismological seismal varying vacillant vacillating transformable rootless uneven slippy teetering temperamental temporary tenuous threatened ticklish top-heavy spasmodic tottery transitive transitory