Wiktionary
a. unfathomed
WordNet
adj. situated at or extending to great depth; too deep to have been sounded or plumbed; "the profound depths of the sea"; "the dark unfathomed caves of ocean"-Thomas Gray; "unplumbed depths of the sea"; "remote and unsounded caverns" [syn: profound, unfathomed, unplumbed]
not made to sound; "the silent `h' at the beginning of `honor'"; "in French certain letters are often unsounded" [syn: silent]
Usage examples of "unsounded".
Even so it was with Theos Alwyn,--drowned in the deep stillness of a merciful swoon, he had sunk, as it were, out of life,--far out of the furthest reach or sense of time, in some vast unsounded gulf of shadows where earth and heaven were alike forgotten!
There, on the dun, wet sands, beyond the foamy tongues of the surf, would lie the worn and curious driftage of alien shores, and trove that hur ricanes had cast up from unsounded deeps.
There, on the dun, wet sands, beyond the foamy tongues of the surf, would lie the worn and curious driftage of alien shores, and trove that hur- ricanes had cast up from unsounded deeps.