liân-ian聯姻

to be related by marriage

to be related by marriage; to form an alliance by marriage; to be related; to form an alliance

English Wiktionary, “聯姻” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E8%81%AF%E5%A7%BB · confidence: Medium (Wiktionary, Hokkien)