Where does “underhalls” come from?

underhalls (English) comes from English halls, from English hall, from Middle English halle, from Old English heall, from Frankish hallu, from Finnish halu, from Finnish halata, from Proto-Germanic halōną — to warm up, to be hot; to warm up, be hot.

underhalls (English): subterranean hallways

Definitions

  1. subterranean hallways

Ancestry of “underhalls”, step by step

underhalls traces back through two separate lines of ancestry.

via English halls

StepLanguageWordMeaning
1Englishhallsplural of hall; API pl; Student accommodation
2EnglishhallA corridor; a hallway; A meeting room; A manor...
3Middle Englishhallehall; Alternative form of hale; Alternative form...
4Old Englishhealla hall; residence; a large room forming part of a...
5Frankishhallularge room, hall; hall
6Finnishhaludesire; urge, itch
7Finnishhalatato hug, embrace; to want
8Proto-Germanichalōnąto call, appoint, summon; to fetch, get
9Proto-Indo-Europeanḱelh₁-to warm up, to be hot; to warm up, be hot

via English under

StepLanguageWordMeaning
1EnglishunderIn or at a lower level than; As a subject of;...
2Middle Englishunderunder
3Old Englishunderunder, beneath
4Proto-Germanicunderamong, between; under, beneath; under
5Proto-Indo-Europeanh₁entérbetween
6Proto-Indo-Europeanh₁enin; in, inside
Every word from Proto-Indo-European ḱelh₁-