be undecided about something; waver between conflicting positions or courses of action; "He oscillates between accepting the new position and retirement"
If something vibrates or if you vibrate it, it shakes with repeated small, quick movements. The ground shook and the cliffs seemed to vibrate The noise vibrated the table. + vibration vibrations vi·bra·tion The vibrations of the vehicles rattled the shop windows. if something vibrates, or if you vibrate it, shakes quickly and continuously with very small movements (past participle of vibrare )
{f} move back and forth rapidly, oscillate; experience a pulsation, tremble; make a sound by vibrating, resonate; be stirred by a moment of deep emotion
To move to and fro, or from side to side, as a pendulum, an elastic rod, or a stretched string, when disturbed from its position of rest; to swing; to oscillate