Where does “rudete” come from?

rudete (Old French) comes from Latin ruditas, from Latin rudis, from Proto-Indo-European Hrew- — to tear out, dig out, open, acquire.

Ancestry of “rudete”, step by step

Step	Language	Word	Meaning
1	Latin	ruditas	accusative feminine plural of rudītus; ignorance
2	Latin	rudis	rough, raw, uncultivated; unrefined, unskilled,...
3	Proto-Indo-European	Hrew-	to tear out, dig out, open, acquire

rudete — Etymology, Origin & Word History | Etymology Explorer