س- (Rumi spelling se-)
From س, shortened form of اسا, from Proto-Malayic *əsa, from Proto-Malayo-Chamic *əsa, from Proto-Malayo-Sumbawan *əsa, from Proto-Sunda-Sulawesi *əsa, from Proto-Malayo-Polynesian *əsa, from Proto-Austronesian *əsa.