v.jam; block/stop up; choke
The highway was blocked by fallen mountain rocks.
On holidays, almost all the roads were blocked with heavy traffic.
The river was blocked up with ice.
The pressure on the transport system sometines lead to congestion.
block up the gap on the wall
The alley is blocked with crowds now.
- Note"塞" cannot be pronounced as "sāi" or "sài" in "堵塞".