Where does “stel” come from?

stel (Middle English) comes from Old French estile, from Latin stylus, from Latin stilus, from Proto-Indo-European (s)teyg- — to be sharp; to sting.

Ancestry of “stel”, step by step

Step	Language	Word	Meaning
1	Old French	estile	style; manner; fashion
2	Latin	stylus	Alternative form of stilus
3	Latin	stilus	A pointed instrument; stake, pale, spike; A...
4	Proto-Indo-European	(s)teyg-	to be sharp; to sting

stel — Etymology, Origin & Word History | Etymology Explorer