Where does “*rādik” come from?

*rādik (Proto-Germanic) comes from Latin rādīx, from Proto-Italic wrādīks, from Proto-Indo-European wréh₂ds — root.

Ancestry of “*rādik”, step by step

Step	Language	Word	Meaning
1	Latin	rādīx	—
2	Proto-Italic	wrādīks	—
3	Proto-Indo-European	wréh₂ds	root

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