Revolve

v. (ying) 1 (cause to) turn round, esp. on an axis; rotate. 2 move in a circular orbit. 3 ponder (a problem etc.) in the mind. 4 (foll. by around) have as its chief concern; be centred upon (his life revolves around his job). [Latin revolvo volut] revolver n. pistol with revolving chambers enabling several shots to be fired without reloading.