HSK 7-9
晃荡
huàngdang动
to rock; to sway; to shake
空水桶在车后不停晃荡。
Kōng shuǐ tǒng zài chē hòu bù tíng huàng dang.
The empty bucket kept rocking in the back of the vehicle.
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Appears across levels (7-9) in the HSK 3.0 word list.