tshin-ke親家

one's child's parents-in-law

one's child's parents-in-law; co-parents-in-law; any relative by marriage; affinal relative; co-father-in-law; co-mother-in-law

English Wiktionary, “親家” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E8%A6%AA%E5%AE%B6 · confidence: High (Wiktionary, PH/Quanzhou/Jinjiang)