Where does “ребро” come from?

ребро (Old East Slavic) comes from Proto-Slavic rebrò, from Proto-Balto-Slavic *rébran, from Proto-Indo-European h₁rebʰ- — to cover, to roof; rib.

Ancestry of “ребро”, step by step

StepLanguageWordMeaning
1Proto-Slavicrebròrib
2Proto-Balto-Slavic*rébranrib
3Proto-Indo-Europeanh₁rebʰ-to cover, to roof; rib

Words derived from “ребро”

Every word from Proto-Indo-European h₁rebʰ- →Every word from Proto-Balto-Slavic *rébran →Every word from Proto-Slavic rebrò →