piáu-á-chí表阿姊

cousin

cousin (mother's sibling's or father's sister's daughter older than oneself)

English Wiktionary, “表阿姊” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E8%A1%A8%E9%98%BF%E5%A7%8A · confidence: High (Wiktionary, PH/Quanzhou/Jinjiang)