HSK 7-9
凑
còu动
to gather together, pool or collect; to happen by chance; to move close to; to exploit an opportunity
大家凑钱买了一台电脑。
Dà jiā còu qián mǎi le yì tái diàn nǎo.
Everyone pooled money to buy a computer.
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Appears across levels (7-9) in the HSK 3.0 word list.