vacillate – waver between different opinions or actions; be indecisive
(Pronounced va-suh-layt)
To remember the definition of the word vacillate, use the following mnemonic:
The desert is vast and it's getting late (vacillate). We were indecisive about which way to go.

Examples of vacillate in a sentence
She would often vacillate with even the most minor decisions.
They needed a leader who wouldn't vacillate under pressure.
He would often vacillate more in stressful situations.