Where does “sesra” come from?

sesra (Proto-Slavic) comes from Proto-Balto-Slavic swésō, from Proto-Indo-European swésōr, from Proto-Indo-European su-h₁ésh₂-ōr, from Proto-Indo-European h₁ésh₂r̥ — blood.

Ancestry of “sesra”, step by step

StepLanguageWordMeaning
1Proto-Balto-Slavicswésōsister
2Proto-Indo-Europeanswésōrsister
3Proto-Indo-Europeansu-h₁ésh₂-ōr
4Proto-Indo-Europeanh₁ésh₂r̥blood

Words derived from “sesra

Every word from Proto-Indo-European h₁ésh₂r̥Every word from Proto-Indo-European su-h₁ésh₂-ōrEvery word from Proto-Indo-European swésōr