HSK 7-9
掺
chān动
to mix; to blend; to dilute; to adulterate
请别在果汁里掺太多水。
Qǐng bié zài guǒ zhī lǐ chān tài duō shuǐ.
Please do not dilute the juice with too much water.
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Appears across levels (7-9) in the HSK 3.0 word list.