Where does “rhwyg” come from?

rhwyg (Welsh) comes from Proto-Indo-European reyk- — to tear, scratch; streak; to carve, scratch, etch.

rhwyg (Welsh): tear, rip

Definitions

Step	Language	Word	Meaning
1	Proto-Indo-European	reyk-	to tear, scratch; streak; to carve, scratch, etch

rhwyg — Etymology, Origin & Word History | Etymology Explorer