Where does “isa” come from?

isa (Proto-Central-Eastern Malayo-Polynesian) comes from Proto-Malayo-Polynesian isa, from Proto-Austronesian isa, from Proto-Austronesian *əsa, from Proto-Oceanic *isa.

Ancestry of “isa”, step by step

isa traces back through two separate lines of ancestry.

via Proto-Malayo-Polynesian isa

StepLanguageWordMeaning
1Proto-Malayo-PolynesianisaAlternative form of *əsa
2Proto-AustronesianisaAlternative form of *əsa
3Proto-Austronesian*əsa
4Proto-Oceanic*isa

via Proto-Malayo-Polynesian əsa

StepLanguageWordMeaning
1Proto-Malayo-Polynesianəsaone
Every word from Proto-Oceanic *isaEvery word from Proto-Austronesian *əsaEvery word from Proto-Austronesian isa