— vacillator , n.
/vas"euh layt'/ , v.i. , vacillated, vacillating .
1. to waver in mind or opinion; be indecisive or irresolute: His tendency to vacillate makes him a poor leader.
2. to sway unsteadily; waver; totter; stagger.
3. to oscillate or fluctuate.
[ 1590-1600; vacillatus (ptp. of vacillare to sway to and fro); see -ATE 1 ]
Syn. 1. hesitate. See waver. 2. reel.