riser /ˈraɪzə/

• 1. 

  N-COUNT An early riser is someone who likes to get up early in the morning. A late riser is someone who likes to get up late. 起床的人 [supp N]

  例：

  He was an early riser and he would be at the breakfast table at seven.

  他习惯早起，七点钟就坐在桌前用早餐。

• 2. 

  N-COUNT A riser is the flat vertical part of a step or a stair. (台阶或楼梯的)立板 [技术]