to be clogged up or jammed, such as traffic, a computer network, or a physical passage; blocked

Blocked up; stagnant; congested; stalemated

To mound soil around the base of a plant to promote growth and prevent it from falling over; also called [[培土|培土|pei2 tu3]]

(literary) to hide from view; to cover; to obscure

an enclosure or defensive wall built outside a city gate to protect it

to block or stop up; to obstruct