Where does “*spinþrijō” come from?

*spinþrijō (Proto-West Germanic) comes from Proto-Indo-European (s)penh₁- — to twist; to weave.

Ancestry of “*spinþrijō”, step by step

Step	Language	Word	Meaning
1	Proto-Indo-European	(s)penh₁-	to twist; to weave

*spinþrijō — Etymology, Origin & Word History | Etymology Explorer