Where does “sebanyak” come from?

sebanyak (Malay) comes from Malay se-, from Old Malay sa-, from Proto-Malayic sA-, from Proto-Malayic əsa, from Proto-Malayo-Chamic əsa, from Proto-Malayo-Sumbawan əsa, from Proto-Malayo-Polynesian əsa, from Proto-Austronesian *əsa.

sebanyak (Malay): as much as; as many as equal in quantity or amount