Reconstruction:Proto-Germanic/durz

Etymology
Likely back-formed from, an old neuter dual form, from.

Noun

 * 1) door, hatch, flap

Usage notes
This word was a plurale tantum in Old Norse, and it might have been used in that way in Proto-Germanic as well (compare the same development with cognate in most Slavic languages); this is further evident by its form in compound words (e.g. compare 🇨🇬, 🇨🇬,, 🇨🇬). In Old High German and Old Dutch it became a singular i-stem, which no doubt derives from the original plural. Old English and Old Saxon show a u-stem noun, which most likely derives from the singular because of the lack of umlaut.