Where does “styl” come from?

styl (Swedish) comes from Latin stilus, from Proto-Indo-European (s)teyg- — to be sharp; to sting.

Ancestry of “styl”, step by step

Step	Language	Word	Meaning
1	Latin	stilus	A pointed instrument; stake, pale, spike; A...
2	Proto-Indo-European	(s)teyg-	to be sharp; to sting

styl — Etymology, Origin & Word History | Etymology Explorer