[vac.il.late] vi -lat.ed ; -lat.ing [L vacillatus, pp. of vacillare to sway, waver--more at wink] (1597) 1 a: to sway through lack of equilibrium b: fluctuate, oscillate
2: to waver in mind, will, or feeling: hesitate in choice of opinions or courses syn see hesitate -- vac.il.lat.ing.ly adv -- vac.il.la.tor n