Where does “pro-” come from?

pro- (Slovene) comes from Proto-Slavic pro-, from Proto-Slavic *pro, from Proto-Balto-Slavic *pra, from Proto-Indo-European pró, from Proto-Indo-European per-, from Proto-Indo-European pr̥tós — passed , crossed.

pro- (Slovene): Forms perfective verbs with the following meanings

Definitions

  1. Forms perfective verbs with the following meanings

Ancestry of “pro-”, step by step

StepLanguageWordMeaning
1Proto-Slavicpro-pro-, for-, through
2Proto-Slavic*profor
3Proto-Balto-Slavic*pra—
4Proto-Indo-Europeanprótoward, leading to
5Proto-Indo-Europeanper-before, in front; first; to go through
6Proto-Indo-Europeanpr̥tóspassed , crossed

Words derived from “pro-”

Every word from Proto-Indo-European pr̥tós →Every word from Proto-Indo-European per- →Every word from Proto-Indo-European pró →