The story
- Old English · inherited fromsiþþan“afterwards, since”
- Middle English · inherited fromsithen
- English todaysithen
From Middle English sithen, sythyn, from Old English siþþan (“afterwards, since”), from sīþ (“since”) + þǣm (“that”). Compare German seitdem, Old Norse síðan.
Words from the same roots
Etymology from Wiktionary, CC BY-SA 4.0.