Entry record from Schapper (2020): Wersing Peitoko
ba[ba]
• part. relativiser, marks the head noun of a relative clause, typically combines with =a closing the relative clause(eng).yang(ind).
Bong ba getia medi kil gpai.Take the wood that is there and make a wooden pin.(eng), Ambil kayu yang ada itu dan buat pen.(ind)
See also: =a