Where does “magkupos” come from?

magkupos (Bikol Central) comes from Bikol Central kupos, from Proto-Malayo-Polynesian *ke(m)pes.

Ancestry of “magkupos”, step by step

StepLanguageWordMeaning
1Bikol Centralkupos—
2Proto-Malayo-Polynesian*ke(m)pes—
Every word from Proto-Malayo-Polynesian *ke(m)pes →Every word from Bikol Central kupos →