What does a grass prefix read next?

I didn't find the word "run under the grass prefix".

The word with similar shapes is "Pu".

"Pu" pú

1. Perennial herbaceous plants, living in ponds, are nearly two meters high. Roots grow in mud and are edible. The leaves are long and sharp, which can be used for making mats and fans. Yellow flowers (also known as "cattail") bloom in summer: ~ yellow (pollen of cattail). ~ great. ~ grass. ~ velvet. ~ fan.

2. refers to "Acorus calamus": ~ knots. ~ month (refers to the fifth month of the lunar calendar).

3. An nunnery, a round house built with grass.

4. The ancient word "prostrate" means prostrate.

5. Last name.