[ sīðmest], sīðor, sīðra v. [sīð II.]
[ +sīðrǣden] f. troop, WW 20621.
[ +sīðscipe] m. fellowship, society, BH.
[ sīðstapel] step, track, LPs 165.
sīðð = [sīð]
[ siðða] adv. and conj. afterwards, JnL, LkL; Met. [‘sith’]
[ siððan], siððon (co, y) I. adv. since, afterwards, from now on, hereafter, further, then, thereupon, after, later, Æ, Bl.
[II.] conj. as soon as, when, since, after that, inasmuch as, Bl, Bo.
[III.] prep. (w. a.) (LWS) after. [‘sithen’; sīð, ðam]