English
hypogeal
From Ancient Greek ὑπόγειος (hupógeios) + English -al.
Formed from hypogeum + -al
Proto-Hellenic *gaya
Ancient Greek γῆ ‘land”, “earth’
Ancient Greek ὑπόγειος ‘underground’
Ancient Greek ὑπόγειον ‘vault, crypt’
Latin hypogaeum ‘crypt, vault’
English hypogeum
Today it means
adj Existing or growing underground
Language periods are conventional ranges, not dates for this word.
Etymograph / hypogeal