piáu-hiaⁿ-só表兄嫂

cousin-in-law

cousin-in-law; cousin's wife (wife of mother's sibling's or father's sister's son older than oneself)

English Wiktionary, “表兄嫂” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E8%A1%A8%E5%85%84%E5%AB%82 · confidence: Medium (Wiktionary)