Where does “-gu” come from?

-gu (Uneapa) comes from Proto-Oceanic *-gu, from Proto-Malayo-Polynesian *-ku, from Proto-Austronesian *-ku.

Ancestry of “-gu”, step by step

StepLanguageWordMeaning
1Proto-Oceanic*-gu—
2Proto-Malayo-Polynesian*-ku—
3Proto-Austronesian*-ku—
Every word from Proto-Austronesian *-ku →Every word from Proto-Malayo-Polynesian *-ku →Every word from Proto-Oceanic *-gu →