Where does “reg-” come from?

reg- (Proto-Balto-Slavic) comes from Proto-Indo-European reǵ- — to bind; straight, direct; straight, right.

Ancestry of “reg-”, step by step

reg- traces back through 3 separate lines of ancestry.

via Proto-Indo-European reǵ-

StepLanguageWordMeaning
1Proto-Indo-Europeanreǵ-to bind; straight, direct; straight, right

via Proto-Indo-European reg-

StepLanguageWordMeaning
1Proto-Indo-Europeanreg-to dye; to straighten, direct, make right; to...

via Proto-Indo-European h₃reǵ-

StepLanguageWordMeaning
1Proto-Indo-Europeanh₃reǵ-to straighten, to right oneself; right; just

Words derived from “reg-

Every word from Proto-Indo-European reǵ-
reg- — Etymology, Origin & Word History | Etymology Explorer