n.[U]

1. 輕快；活潑；靈活
   Angela danced with great briskness at the ball.

   在舞會上安琪拉非常輕快地跳舞。

2. 清新
   Father opened the windows to let in the briskness of the morning air.

   父親打開窗戶讓早晨的清新空氣進來。