←
Middle Dutch boec (derived)
←
Proto-Germanic *bōks (derived)
←
Old Dutch buok (derived)
←
Proto-Malayic *buku (inherited)
←
Proto-Malayo-Polynesian *buku (inherited)
→
Balinese ᬩᬸᬓᬸ (derived)
→
Indonesian buku (inherited)
→
Indonesian buku (inherited)
→
Brunei Malay buku (cognate)