English
hydrostable
From hydro- + stable.
Proto-Indo-European *wed- ‘water’
Proto-Indo-European *wódr̥ ‘water’
Proto-Hellenic *údōr ‘water’
Ancient Greek ῡ̆̔́δωρ ‘water’
English hydro-
Proto-Indo-European *steh₂- ‘to stand’
…
Proto-Italic *staðlom ‘place’
Latin stabulum ‘stable, dwelling’
Anglo-Norman estable ‘stable’
Middle English stable ‘stable (building)’
English stable
Today it means
adj stable in the presence of water
Language periods are conventional ranges, not dates for this word.
Etymograph / hydrostable