Where does “dor” come from?

dor (Middle English) comes from Old English duru, from Proto-West Germanic *dur, from Proto-Germanic *durz, from Proto-Indo-European dʰwṓr, from Proto-Indo-European dʰwer- — door.

Ancestry of “dor”, step by step

dor traces back through two separate lines of ancestry.

via Old English duru

StepLanguageWordMeaning
1Old Englishdurua door; an opening
2Proto-West Germanic*durdoor, hatch, flap
3Proto-Germanic*durz—
4Proto-Indo-Europeandʰwṓrdoor
5Proto-Indo-Europeandʰwer-door

via Old English dor

StepLanguageWordMeaning
1Old Englishdora large door, a gate
2Proto-Germanicdurzdoor, hatch, flap
3Proto-Indo-Europeandʰur-ih₁—
Every word from Proto-Indo-European dʰwer- →Every word from Proto-Indo-European dʰwṓr →Every word from Proto-Germanic *durz →
dor — Etymology, Origin & Word History | Etymology Explorer