oscillate

To swing back and forth with a steady, uninterrupted rhythm.

To waver, as between conflicting opinions or courses of action; vacillate: synonym: swing.

To vary between alternate extremes, usually within a definable period of time.

To swing; move backward and forward; vibrate, as a pendulum.

Hence To vary or fluctuate; waver.

Synonyms Vacillate, Waver, etc. See fluctuate.

To cause to swing or move backward and forward; cause to vibrate or swing to and fro.

To move backward and forward; to vibrate like a pendulum; to swing; to sway.

To vary or fluctuate between fixed limits; to act or move in a fickle or fluctuating manner; to change repeatedly, back and forth.

To swing back and forth, especially if with a regular rhythm.