Where does “ubi” come from?

ubi (Proto-Malayic) comes from Proto-Malayo-Chamic hubi, from Proto-Malayo-Sumbawan hubi, from Proto-Malayo-Polynesian qubi — The purple yam, Dioscorea alata.

Ancestry of “ubi”, step by step

StepLanguageWordMeaning
1Proto-Malayo-Chamichubi—
2Proto-Malayo-Sumbawanhubi—
3Proto-Malayo-PolynesianqubiThe purple yam, Dioscorea alata
Every word from Proto-Malayo-Polynesian qubi →Every word from Proto-Malayo-Sumbawan hubi →Every word from Proto-Malayo-Chamic hubi →