chó͘-chó͘祖祖

great-grandfather

great-grandfather (particularly paternal grandfather's father); great-grandmother (particularly paternal grandfather's mother)

Guiyang MandarinSichuan

English Wiktionary, “祖祖” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E7%A5%96%E7%A5%96 · confidence: Medium (Wiktionary)