Vacillate (verb)

1. To waver indecisively between different opinions or actions; to be uncertain or indecisive.
2. To sway or fluctuate unsteadily.

Origin:

From the latin word "vacillare" meaning "to sway, waver".

Examples:

1. He vacillated between accepting the job offer and staying in his current position.
2. She vacillated between going to the concert and staying home.
3. The stock market vacillated wildly during the economic crisis.
4. He vacillated on his position on the issue, unable to make a decision.
5. The politician vacillated on his stance on the issue, trying to please both sides.