vacillating 1. Wavering in mind or opinion; being indecisive or irresolute: 'His vacillating tendency makes him a poor leader.' 2. Swaying unsteadily; wavering; tottering; staggering. 3. Oscillating or fluctuating; that is, swinging indecisively from one course of action or opinion to another. Found on http://www.wordinfo.info/words/index/info/view_unit/2257/