gōe-seng-sài外甥婿

nephew-in-law

nephew-in-law (sister's son-in-law); grandson-in-law (daughter's son-in-law)

English Wiktionary, “外甥婿” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E5%A4%96%E7%94%A5%E5%A9%BF · confidence: Medium (Wiktionary)