Where does “*asu(ʔ)” come from?

*asu(ʔ) (Proto-Malayic) comes from Proto-Malayo-Polynesian asu, from Proto-Austronesian asu.

Ancestry of “*asu(ʔ)”, step by step

Step	Language	Word	Meaning
1	Proto-Malayo-Polynesian	asu	dog
2	Proto-Austronesian	asu	—

*asu(ʔ) — Etymology, Origin & Word History | Etymology Explorer