상하

〔上下〕

1. top and bottom
The upper and lower sides.

2. superiors and inferiors
Seniors and juniors.

3. the upper and lower classes; high and low
The noble and the mean.

4. high quality and low quality
Good quality and poor quality.

5. increase and decrease
Rise and fall.

6. the first and second volumes
The first and second volumes of a book of two volumes.