Where does “mapatig-ab” come from?

mapatig-ab (Bikol Central) comes from Bikol Central patigab, from Bikol Central tigab, from Proto-Malayo-Polynesian *təʀab, from Proto-Austronesian *Cəʀab — a belch.

Ancestry of “mapatig-ab”, step by step

StepLanguageWordMeaning
1Bikol Centralpatigab—
2Bikol Centraltigab—
3Proto-Malayo-Polynesian*təʀaba belch
4Proto-Austronesian*Cəʀaba belch
Every word from Proto-Austronesian *Cəʀab →Every word from Proto-Malayo-Polynesian *təʀab →Every word from Bikol Central tigab →