vacillate

A towering outside hitter, he was known for his ability to vacillate between power and finesse.

His children, Kelly and Jack, vacillated between showering him with affection and berating him for not catering to their whims.

The American people appear to be vacillating between learned helplessness and mass disinhibition.

It was the first in a series of scary scenes for Brinkley, whose feelings for Joel vacillated between veneration, unconditional love and abject fear.

He attributed the vacillating accounts to Phillip’s plight as a witness who “saw his mother murdered before his very eyes” but still loved the killer.