Where does “swinþaz” come from?

swinþaz (Proto-Germanic) comes from Proto-Indo-European swent- — vigorous, active, healthy; active, healthy.

swinþaz (Proto-Germanic): strong

Definitions

Step	Language	Word	Meaning
1	Proto-Indo-European	swent-	vigorous, active, healthy; active, healthy

swinþaz — Etymology, Origin & Word History | Etymology Explorer