The story
- Proto-Austronesian*batux
- Proto-Malayo-Polynesian*batu
- Proto-Central-Eastern Malayo-Polynesian*batu
- Proto-Eastern Malayo-Polynesian*batu
- Proto-Oceanic*patu
- Ragavat
- Bislamavat
- English todayvatu
Borrowed from Bislama vatu (“stone”), borrowed from Raga vatu (“stone”), from Proto-Oceanic *patu (“stone”).
Etymology from Wiktionary, CC BY-SA 4.0.