HSK 7-9
哗然
huárán形
in uproar; commotion; causing a storm of protest; tumultuous
裁判突然改判引起全场哗然。
Cái pàn tū rán gǎi pàn yǐn qǐ quán chǎng huá rán.
The referee's sudden reversal caused an uproar throughout the venue.
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Appears across levels (7-9) in the HSK 3.0 word list.