聯姻

liányīn

Originally referred to two family becoming relatives through marriage. Now it metaphorically means that two or more parties join efforts, cooperate or establish close relationships.

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lian2 yin1

related by marriage, to connect by marriage (families, work units)

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聯姻|联姻 [lián yīn] ► related by marriage ► to connect by marriage (families, work units)