Merriam-Webster Collegiate Dictionary - vibrate

 verb  (~d; vibrating)  Etymology: Latin vibratus, past participle of vibrare to brandish, wave, rock — more at wipe  Date: 1616  transitive verb  1. to swing or move to and fro  2. to emit with or as if with a vibratory motion  3. to mark or measure by oscillation a pendulum vibrating seconds  4. to set in vibration  intransitive verb  1.  a. to move to and fro or from side to side ; oscillate  b. fluctuate, vacillate ~ between two choices  2. to have an effect as or as if of vibration music, when soft voices die, ~s in the memory — P. B. Shelley  3. to be in a state of vibration ; quiver  4. to respond sympathetically ; thrill ~ to the opportunity  Synonyms: see swing