Where does “sudanaz” come from?

sudanaz (Proto-Germanic) comes from Proto-Germanic seuþaną, from Proto-Indo-European h₂sewt- — to roil; to move about, roil, seethe.

Ancestry of “sudanaz”, step by step

Step	Language	Word	Meaning
1	Proto-Germanic	seuþaną	to seethe; boil
2	Proto-Indo-European	h₂sewt-	to roil; to move about, roil, seethe

sudanaz — Etymology, Origin & Word History | Etymology Explorer