Where does “vinster” come from?

vinster (Middle Low German) comes from Latin fenestra, from Etruscan *𐌚𐌍𐌄𐌔𐌕𐌓𐌀.

Ancestry of “vinster”, step by step

Step	Language	Word	Meaning
1	Latin	fenestra	a window, an opening for light; a breach; a...
2	Etruscan	*𐌚𐌍𐌄𐌔𐌕𐌓𐌀	—