rev

(rĕv) Informal

1. a. To increase the speed of (a motor, for example): revved the engine.
   b. To accelerate or increase: orders to rev up factory output.
2. To make livelier or more productive: revving ourselves up for the game; efforts to rev the economy.

1. To operate at an increased speed: heard the motors revving.
2. To accelerate in quantity or activity.