Where does “upfloor” come from?

upfloor (English) comes from English floor, from Middle English flor, from Old English flōr, from Proto-Germanic flōraz, from Proto-Indo-European pleh₂ros, from Proto-Indo-European pleh₂- — flat.

upfloor (English): An upper storey, especially a gallery or arcade above the arches of the nave, choir, and transepts of a church

Definitions

  1. An upper storey, especially a gallery or arcade above the arches of the nave, choir, and transepts of a church

Ancestry of “upfloor”, step by step

upfloor traces back through two separate lines of ancestry.

via English floor

StepLanguageWordMeaning
1EnglishfloorThe interior bottom or surface of a house or...
2Middle EnglishflorA floor; the bottom surface of a room or...
3Old Englishflōrfloor, pavement, ground; floor, pavement, ground,...
4Proto-Germanicflōrazground; floor
5Proto-Indo-Europeanpleh₂rosflat; floor
6Proto-Indo-Europeanpleh₂-flat

via English up

StepLanguageWordMeaning
1EnglishupAway from the surface of the Earth or other...
2Middle Englishupto a vertical axis
3Old Englishuppup; upstairs
4Proto-West Germanic*upp
Every word from Proto-Indo-European pleh₂-Every word from Proto-Indo-European pleh₂rosEvery word from Proto-Germanic flōraz