block off

US /blɑːk ɑːf/
UK /blɑːk ɑːf/
"block off" picture
1.

封锁, 堵塞

to close a road, path, or entrance so that people cannot use it

:
Police had to block off the street due to the accident.
由于事故,警方不得不封锁街道。
They decided to block off the old entrance to prevent unauthorized access.
他们决定封锁旧入口,以防止未经授权的进入。