Where does “ронить” come from?

ронить (Russian) comes from Old East Slavic ронити, from Proto-Slavic roniti — to shed.

Ancestry of “ронить”, step by step

Step	Language	Word	Meaning
1	Old East Slavic	ронити	—
2	Proto-Slavic	roniti	to shed

Words derived from “ронить”

ронять

Every word from Proto-Slavic roniti →Every word from Old East Slavic ронити →