Where does “*isu,*usu” come from?
*isu,*usu (Proto-Polynesian) comes from Proto-Oceanic *icuŋ, from Proto-Malayo-Polynesian *ijuŋ, from Proto-Malayo-Polynesian ujuŋ, from Proto-Austronesian mujiŋ — nose.
Ancestry of “*isu,*usu”, step by step
| Step | Language | Word | Meaning |
|---|
| 1 | Proto-Oceanic | *icuŋ | — |
| 2 | Proto-Malayo-Polynesian | *ijuŋ | — |
| 3 | Proto-Malayo-Polynesian | ujuŋ | Alternative form of *ijuŋ |
| 4 | Proto-Austronesian | mujiŋ | nose |