Shalch, "what shalch zai to om" (R.,passim), shall I—shal[l i]ch.
Shales, "served but with shales" (R[214],d), shells.
Sharings (R[183],c), shearings.
Shent, "you will be shent" (N[105],c, et passim), blamed.
Shroud cell (M[17],c),? privy place, such as the crypt of a church: shrouds are properly places under ground: the meaning is that Mankind has met Mercy privately.
Side, see Aloft.
Side-gown, "his side-gown may be sold" (M[29],d), long gown: cf. "side-sleeves" = long sleeves. There are examples enough in Nares.
Si didero (M[20],d), i.e. "I'll pay you back with profit" (E.E.T.S. ed.).
Sighing, "weeping, sighing, and sobbing" (M[32],d), the sythynge of the original seems worth recording.