Etymology
1. Etymology tree
2. Old English duru
3. Middle English dore
4. English door
5. From Middle English dore, dor, from Old English duru (“door”), dor (“gate”), from Proto-West Germanic *dur, from Proto-Germanic *durz, from Proto-Indo-European *dʰwṓr, from *dʰwer- (“doorway, door, gate”).
6. Cognates
7. Cognate with Scots door (“door”), Saterland Frisian Doore (“door”), West Frisian doar (“door”), Dutch deur (“door”), German Low German Door, Döör (“door”), German Tür (“door”), Tor (“gate”), Danish, Norn, Norwegian Bokmål, and Norwegian Nynorsk dør (“door”), Swedish dörr (“door”), Faroese and Icelandic dyr (“door”), Asturian, Aragonese and Spanish fuera (“outside”), Catalan, Leonese, and Portuguese fora (“outside”), French hors (“outside”), Galician fóra (“outside”), Italian fuori (“outside”), Mirandese fuora (“outside”), Latin foris and foras (“outside”), Ancient Greek θύρα (thúra), Albanian derë (“door”), Central Kurdish دەرگە (derge, “door”), Northern Kurdish derî (“door”), Persian در (dar, “door”), Belarusian дзве́ры (dzvjéry, “door”), Bulgarian две́ри (dvéri, “royal doors”), Czech dveře (“door”), Latvian durvis (“door”), Lithuanian durys (“door”), Macedonian двер (dver, “door”), Polish drzwi (“door”), Russian дверь (dverʹ), Serbo-Croatian dvȇri (“door”), dvar (“door”), Ukrainian две́рі (dvéri, “door”), Hindi द्वार (dvār, “door”), Armenian դուռ (duṙ, “door”), Irish doras (“door”), Sanskrit द्वार (dvāra, “door”).
8. Despite similarities in spelling, not cognate with Dutch door, which is instead cognate with English through. See: Frisian, Saterlandic 'Doore', Armenian '
դուռ'.