Where does “fiesten” come from?

fiesten (Middle English) comes from Old English fistan, from Proto-Germanic fistaz, from Proto-Germanic fīsaną, from Proto-Indo-European (s)peys- — to blow, breathe; to blow to make noise; to blow;...

Ancestry of “fiesten”, step by step

Step	Language	Word	Meaning
1	Old English	fistan	—
2	Proto-Germanic	fistaz	breaking wind, fart
3	Proto-Germanic	fīsaną	to blow; to fart
4	Proto-Indo-European	(s)peys-	to blow, breathe; to blow to make noise; to blow;...

Every word from Proto-Indo-European (s)peys- →Every word from Proto-Germanic fīsaną →Every word from Proto-Germanic fistaz →