HSK 7-9
愣
lèng动形副
to look distracted; to stare blankly; distracted; blank
听到消息他当场愣住了。
Tīngdào xiāoxi tā dāngchǎng lèngzhù le.
He froze on the spot when he heard the news.
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Appears across levels (7-9) in the HSK 3.0 word list.