Where does “э́-” come from?

э́- (Russian) comes from Proto-Indo-European h₁é, from Proto-Indo-European ǵʰe — Postpositional intensifying particle: indeed, at any rate, in fact.

Ancestry of “э́-”, step by step

э́- traces back through two separate lines of ancestry.

via Proto-Indo-European h₁é

StepLanguageWordMeaning
1Proto-Indo-Europeanh₁éand, then
2Proto-Indo-EuropeanǵʰePostpositional intensifying particle: indeed, at any rate, in fact

via Proto-Turkic ẹŕ-

StepLanguageWordMeaning
1Proto-Turkicẹŕ-to be

Words derived from “э́-”

Every word from Proto-Indo-European ǵʰe →Every word from Proto-Indo-European h₁é →