late 14c., "rebel," agent noun from rise (v.). Meaning "one who rises" (from bed, in a certain manner) is mid-15c. Meaning "upright part of a step" is from 1771.
例文
1. He is an early riser .
彼は早起きに慣れている.
2.He was an early riser and he would be at the breakfast table at seven.
彼は早起きに慣れており、7時にはテーブルの前に座って朝食を食べている。
3.Our manager is an early riser .
私たちのマネージャーは有能な人です。
4.Sulfur content of gasoline reduces gradually along the riser .
ガソリン硫黄含有量はリフトパイプ高さに沿って増加し、徐々に減少している。
5.Using a stencil I then draw out the shape of the riser .