Where does “kwerna” come from?

kwerna (Old Dutch) comes from Proto-Germanic kwernuz, from Proto-Indo-European gʷérh₂nus, from Proto-Indo-European gʷréh₂wō, from Proto-Indo-European gʷréh₂us, from Proto-Indo-European -us — Forms adjectives from Caland system roots.

Ancestry of “kwerna”, step by step

StepLanguageWordMeaning
1Proto-Germanickwernuzmillstone; handmill; quern
2Proto-Indo-Europeangʷérh₂nus—
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 →