1. (p. pr. & vb. n.) of Vacillate.

2. (a.) Inclined to fluctuate; wavering.

adrift afloat alternating amorphous capricious changeable changeful coquettish desultory deviable dizzy eccentric erratic faddish fast and loose fickle fitful flickering flighty flirtatious flitting fluctuant fluctuating fluctuational freakish giddy harmonic impetuous impulsive inconsistent inconstant indecisive infirm irregular irresolute irresponsible libratory light mazy mercurial moody nutational oscillating oscillatory pendular pendulating pendulous periodic quicksilver rambling resonant restless roving scatterbrained shapeless shifting shifty shilly-shally shilly-shallying shuffling skittish spasmodic spineless toying unaccountable uncertain uncontrolled undependable undisciplined unfixed unpredictable unreliable unrestrained unsettled unstable unstable as water unstaid unsteadfast unsteady vacillatory vagrant variable versatile vibratile vibrating vibratory vicissitudinary vicissitudinous volatile wandering wanton wavering wavery wavy wayward whimsical wishy-washy wobbly