Where does “swowen” come from?

swowen (Middle English) comes from Old English swōgan, from Proto-Germanic swōganą, from Proto-Indo-European sweh₂gʰ- — to wail.

Ancestry of “swowen”, step by step

Step	Language	Word	Meaning
1	Old English	swōgan	to make a sound, overrun, suffocate; to make a...
2	Proto-Germanic	swōganą	to overwhelm, break in; to resound
3	Proto-Indo-European	sweh₂gʰ-	to wail

swowen — Etymology, Origin & Word History | Etymology Explorer