since
The origin and history of since.
Etymology
This word comes from Middle English syns, synnes, a contraction of the earlier sithens, sithence, from sithen ("after, since") plus -s, an adverbial genitive suffix, from Old English sīþþan, from the phrase sīþ þǣm ("after/since that (time)"), made up of sīþ ("since, after") and þǣm, the dative singular of þæt. It is cognate with Dutch sinds ("since"), German seit ("since"), Danish siden ("since"), Icelandic síðan ("since"), and Scots syne ("since").