Where does “vierkantswortel” come from?

vierkantswortel (Dutch) comes from Dutch vierkant, from Dutch vier, from Middle Dutch vier, from Old Dutch fuïr, from Proto-West Germanic fuir, from Proto-Germanic fōr, from Proto-Indo-European péh₂wr̥ — bonfire; spelt.

vierkantswortel (Dutch): square root

Definitions

square root

Ancestry of “vierkantswortel”, step by step

vierkantswortel traces back through two separate lines of ancestry.

via Dutch vierkant

Step	Language	Word	Meaning
1	Dutch	vierkant	square; completely; in one's face
2	Dutch	vier	four
3	Middle Dutch	vier	four; Alternative form of vuur
4	Old Dutch	fuïr	fire
5	Proto-West Germanic	fuir	fire
6	Proto-Germanic	fōr	fire
7	Proto-Indo-European	péh₂wr̥	bonfire; spelt

via Dutch wortel

Step	Language	Word	Meaning
1	Dutch	wortel	carrot; root; square root, root
2	Middle Dutch	wortele	root; edible root
3	Old Dutch	wurtala	—
4	Proto-Germanic	wurt-	oblique stem of *wrōts
5	Proto-Germanic	wrōts	root
6	Proto-Indo-European	wréh₂ds	root

Every word from Proto-Indo-European péh₂wr̥ →Every word from Proto-Germanic fōr →Every word from Proto-West Germanic fuir →