Where does “zwaevel” come from?

zwaevel (Limburgish) comes from Middle Dutch swēvel, from Old Dutch sweval, from Proto-Germanic sweblaz — sulfur.

zwaevel (Limburgish): sulfur; A part of sulfur

Definitions

Step	Language	Word	Meaning
1	Middle Dutch	swēvel	—
2	Old Dutch	sweval	—
3	Proto-Germanic	sweblaz	sulfur

zwaevel — Etymology, Origin & Word History | Etymology Explorer