HSK 7-9
封锁
fēngsuǒ动
to blockade; to seal off; to lock down
警方临时封锁了事故路段。
Jǐng fāng lín shí fēng suǒ le shì gù lù duàn.
The police temporarily sealed off the section where the accident occurred.
Say it
Hold the button, say it, then let go.
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Appears across levels (7-9) in the HSK 3.0 word list.