Either a borrowing from Middle High Germanzolle, or an earlier borrowing from Lombardicscolla, zolla, (modern German Scholle), from Proto-Germanic*skaljō (compare West Frisian skyl(“peel, rind”), Dutch schil(“peel, skin, rink”), Low German Schell(“shell, scale”)), from Proto-Indo-European*(s)kelH-(“to split, cleave”) (compare Irish scelec(“pebble”), Latin silex(“pebble, flint”), siliqua(“pod”), Old Church Slavonic сколика(skolika, “shell”)).