s,

sound of, [65];

followed by u, [27], [65];

(and ss) used for z, [21], [67];

intervocalic, [155];

ss from tt, [159];

changed to r, [154], [488];

(and st), initial, disappearance of, [169, 4];

medial, disappearance of, [170, 2];

final, disappearance of, [66], [171];