Nine in Austronesian languages- Tagalog: siam, Fijian: siwa, Malagasy: sivy, some Formosan langs of Taiwan: sio, siia, siwa, siva
As it is plural,why is it not buku buku?
In Bahasa Indonesia Sembilan (nine) shows that it already plural.
Quite an achievement.
sounds unnatural, better would be: I have read nine books
Sembilan = esa ambilan
Takes one from ten