subterrenean |
underground |
Subterrenean is likely misspelled.
Subterrenean has no English definition.
As an adjective underground is
below the ground; below the surface of the Earth.
As an adverb underground is
below the ground.
As a noun underground is
an underground railway.
As a verb underground is
to route electricity distribution cables underground.
As a proper noun Underground is
the London Underground.