S

Semitic Šîn (bow) was pronounced as /S/ as the modern English digraph SH. In Greek, there was only one phoneme /s/ and no /S/, so Greek σιγμα (sigma) came to represent the Greek /s/ phoneme. The name "sigma" probably comes from the Semitic letter "Sâmek" and not "Šîn". In Etruscan and Latin, the /s/ value was maintained, and only in modern languages, S came to represent other sounds, like /S/ in Hungarian or /z/ in English and French (in English RISE and French LISER to read).