Where does “riftiją” come from?

riftiją (Proto-Germanic) comes from Proto-Indo-European h₁rebʰ- — to cover, to roof; rib.

Ancestry of “riftiją”, step by step

StepLanguageWordMeaning
1Proto-Indo-Europeanh₁rebʰ-to cover, to roof; rib
Every word from Proto-Indo-European h₁rebʰ-