vacillate
Definitions
To waver between different opinions or actions; to be irresolute.
To sway unsteadily from one side to another; to oscillate.
Examples
She continued to vacillate between choosing the blue dress and the red one for the gala.
The committee members vacillate on the issue of budget cuts, unable to reach a final consensus.
It is frustrating to watch the stock market vacillate so wildly throughout the trading day.