Correct

梗塞

/ gěngsè / 
Strokes

Definition

to clog/to block/to obstruct

Example

As a Verb

block; choke; obstruct; clog

1
Yāncōng
烟囱
gěng
梗
sè
塞
le
了
  
。

The chimney is choked/clogged up.

2
Jiāotōng
交通
gěngsè
梗塞

traffic jam/block