1. unfathomed - Adjective
2. unfathomed - Adjective Satellite
situated at or extending to great depth; too deep to have been sounded or plumbed
Source: WordNetFull many a gem of purest ray serene, The dark unfathomed caves of ocean bear: Full many a flower is born to blush unseen, And waste its sweetness on the desert air. Thomas Gray
Ah, what a life is theirs who live in Christ; How vast the mystery! Reaching in height to heaven, and in its depth The unfathomed sea! Elizabeth Prentiss
The soul of man is larger than the sky, Deeper than ocean, or the abysmal dark Of the unfathomed center. Hartley Coleridge
We need the tonic of wildness...At the same time that we are earnest to explore and learn all things, we require that all things be mysterious and unexplorable, that land and sea be indefinitely wild, unsurveyed and unfathomed by us because unfathomable. We can never have enough of nature. Henry David Thoreau
The Past -- the dark unfathomed retrospect The teeming gulf --the sleepers and the shadows The past the infinite greatness of the past For what is the present after all but a growth out of the past. Walt Whitman
the profound depths of the sea Source: Internet