Where does “cweorndun” come from?

cweorndun (Old English) comes from Old English cweorn, from Proto-West Germanic *kwernu, 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 “cweorndun”, step by step

cweorndun traces back through two separate lines of ancestry.

via Old English cweorn

StepLanguageWordMeaning
1Old Englishcweornquern
2Proto-West Germanic*kwernuquern, hand-mill
3Proto-Germanickwernōmillstone; handmill; quern
4Proto-Indo-Europeangʷréh₂wōquern, mill-stone
5Proto-Indo-Europeangʷréh₂usheavy
6Proto-Indo-European-usForms adjectives from Caland system roots

via Old English dūn

StepLanguageWordMeaning
1Old Englishdūnhill, down; hill, dune; hill, mountain
2Proto-Germanic*dūnā—
3Proto-Celticdūnomstronghold, rampart
4Proto-Indo-Europeandʰewh₂-smoke; mist, haze

Words derived from “cweorndun”

Every word from Proto-Indo-European -us →Every word from Proto-Indo-European gʷréh₂us →Every word from Proto-Indo-European gʷréh₂wō →