Focus on the pronunciation of vacillate
English definition of “vacillate”
/ˈvæsɪleɪt/ verb [I]
› FINANCE if prices, rates, etc. vacillate, they keep rising and falling by small amounts: After weeks of vacillating around $75 per barrel, the price of crude closed at $85 barrel.
› to be uncertain about what to do or to keep changing your opinion about something: vacillate between sth (and sth) The election result was in the hands of voters vacillating between two parties.