Where does “swā” come from?

swā (Old English) comes from Proto-West Germanic swā, from Proto-Germanic swa, from Proto-Germanic swē, from Proto-Indo-European swē.

swā (Old English): so

Definitions

Step	Language	Word	Meaning
1	Proto-West Germanic	swā	so, thus, in this manner; like, similar to; just...
2	Proto-Germanic	swa	so, thus, in this manner
3	Proto-Germanic	swē	like, similar to; just like, in the same manner...
4	Proto-Indo-European	swē	—

swā — Etymology, Origin & Word History | Etymology Explorer