solwy

The story

1. Old English · derived fromsolu“mud, mire”
2. Old English · inherited from*solwiġ“miry”
3. Middle English · inherited fromsolwi
4. English todaysolwy

From Middle English solwi (also solowe), from Old English *solwiġ (“miry”), from solwe, the oblique form of Old English solu (“mud, mire”). More at soil.