Answer: oscillate

AnswerCrossword Clue
OSCILLATEBehave like some fans
OSCILLATESwing both ways
OSCILLATESeesaw
OSCILLATESwing.
OSCILLATEWaver
OSCILLATESwing
OSCILLATESwing to and fro
oscillate(of a circuit or device) Cause the electric current or voltage running through it to behave in this way
oscillateWaver between extremes of opinion, action, or quality
oscillateto swing to and fro like a pendulum
oscillateVary in magnitude or position in a regular manner around a central point
oscillateMove or swing back and forth at a regular speed