English

hydrospace

From hydro- + space.

A compound of hydro- + space

Proto-Indo-European *wed- ‘water’

Proto-Indo-European *wódr̥ ‘water’

Proto-Hellenic *údōr ‘water’

Ancient Greek ῡ̆̔́δωρ ‘water’

Proto-Indo-European *(s)peh₂- ‘to stretch’

Latin spatium ‘space’

Old French espace ‘space’

Anglo-Norman space

Middle English space

English space

Today it means

noun That part of the Earth, or other planet, that lies below the surface of its lakes, seas and oceans,

Language periods are conventional ranges, not dates for this word.

Etymograph / hydrospace