Where does “родьство” come from?

родьство (Old Church Slavonic) comes from Old East Slavic родъ, from Proto-Slavic rǫdъ, from Proto-Balto-Slavic radás, from Proto-Indo-European wréh₂ds — root.

родьство (Old Church Slavonic): birth

Definitions

birth

Ancestry of “родьство”, step by step

Step	Language	Word	Meaning
1	Old East Slavic	родъ	—
2	Proto-Slavic	rǫdъ	thorny, prickly; curly, locky
3	Proto-Balto-Slavic	radás	birth, genus
4	Proto-Indo-European	wréh₂ds	root

Every word from Proto-Indo-European wréh₂ds →Every word from Proto-Balto-Slavic radás →Every word from Proto-Slavic rǫdъ →