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v. Present participle of vacillate.

adj. Liable to vacillate; wavering, irresolute.

adj. Inclined to fluctuate; wavering.

adj. uncertain in purpose or action

"My friend, who may mildly be described as vacillating in temperament, left me in Calcutta."

irresolute   

constant   

wavering    willy nilly    shilly-shally   

vacillate   

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