HSK 7-9
发愣
fālèng动
to stare blankly; to be in a daze
听到突然提问他站着发愣。
Tīng dào tū rán tí wèn tā zhàn zhe fā lèng.
He stood in a daze after hearing the unexpected question.
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Appears across levels (7-9) in the HSK 3.0 word list.