Where does “до-” come from?

до- (Old East Slavic) comes from Proto-Slavic dȍ, from Proto-Indo-European de — Emphatic or contrastive particle, and, but;...

Ancestry of “до-”, step by step

StepLanguageWordMeaning
1Proto-Slavicdȍup to, until
2Proto-Indo-EuropeandeEmphatic or contrastive particle, and, but;...
Every word from Proto-Indo-European de →Every word from Proto-Slavic dȍ →