Where does “tahu” come from?

tahu (Proto-Malayo-Sumbawan) comes from Proto-Sunda-Sulawesi tahu, from Proto-Malayo-Polynesian taqu, from Proto-Austronesian Caqu — to know how, be able to.

Ancestry of “tahu”, step by step

StepLanguageWordMeaning
1Proto-Sunda-Sulawesitahu—
2Proto-Malayo-Polynesiantaquto know how; be able to
3Proto-AustronesianCaquto know how, be able to
Every word from Proto-Austronesian Caqu →Every word from Proto-Malayo-Polynesian taqu →Every word from Proto-Sunda-Sulawesi tahu →