Wiktionary
sub-surface
a. (alternative spelling of subsurface English)
Usage examples of "sub-surface".
I've still got one continent, the deep sea beds and the sub-surface to do.
Edie Dorn and two other inertials followed him to a motel named the Bonds of Erotic Polymorphic Experience, a sixty-unit sub-surface structure catering to businessmen and their hookers who dont want to be entertained.