Where does “скорлупа” come from?

скорлупа (Old East Slavic) comes from Proto-Slavic skorupa, from Proto-Slavic skora, from Proto-Indo-European (s)ḱer- — dung, manure, filth; manure, dung, filth.

Ancestry of “скорлупа”, step by step

StepLanguageWordMeaning
1Proto-Slavicskorupacrust?, shell?
2Proto-Slavicskorabast, skin
3Proto-Indo-European(s)ḱer-dung, manure, filth; manure, dung, filth

Words derived from “скорлупа”

Every word from Proto-Indo-European (s)ḱer- →Every word from Proto-Slavic skora →Every word from Proto-Slavic skorupa →