Where does “kvarn” come from?

kvarn (Old Swedish) comes from Old Norse kvern, from Proto-Germanic kwernō, from Proto-Indo-European gʷréh₂wō, from Proto-Indo-European gʷréh₂us, from Proto-Indo-European -us — Forms adjectives from Caland system roots.

Ancestry of “kvarn”, step by step

StepLanguageWordMeaning
1Old Norsekverna millstone; a quern, handmill
2Proto-Germanickwernōmillstone; handmill; quern
3Proto-Indo-Europeangʷréh₂wōquern, mill-stone
4Proto-Indo-Europeangʷréh₂usheavy
5Proto-Indo-European-usForms adjectives from Caland system roots
Every word from Proto-Indo-European -us →Every word from Proto-Indo-European gʷréh₂us →Every word from Proto-Indo-European gʷréh₂wō →