This is the 988th most frequent Malay word.
a
In Malay, "a" has no meaning on its own; it is not a standalone word.
The word 'sebuah' accompanies 'rumah' to indicate a single, unspecified house.
Saya ingin membeli sebuah rumah.
I want to buy a house.
'Sebuah' is used to denote one object, 'buku', making it clear it's an unidentified book.
Dia membaca sebuah buku di perpustakaan.
He is reading a book in the library.
Here, 'sebiji' specifies that the found object is one ball, emphasizing its singularity.