HSK 7-9
扣留
kòuliú动
to detain sb; to hold sb against their will; to withhold (property, documents, funds etc)
海关暂时扣留了那批货物。
Hǎiguān zànshí kòuliú le nà pī huòwù.
Customs temporarily withheld that shipment.
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Appears across levels (7-9) in the HSK 3.0 word list.