(1) Situated at or extending to great depth; too deep to have been sounded or plumbed
(2) Situated at or extending to great depth
(3) Too deep to have been sounded or plumbed
(4) Situated deep or wide
(1) To those at the dedication service in 1915, it must have perfectly captured the image of the dark, unfathomed sea closing over their loved ones.
(2) Under his leadership, the Tory Party sank to unfathomed levels of unpopularity and contempt.
(3) Is the deliberate manipulation of a culture a threat to the very essence of man or, at the other extreme, an unfathomed source of strength for the culture which encourages it?
(4) The issue of motorists being impounded by road traffic officers over trivial charges has left pain in lots of people, deep as the unfathomed sea.
(5) It was the summer before her 9th grade year, months that dwelled in limbo between gradually evaporating innocence and a monsoon of unfathomed tears.
(6) Paul's wonderfully bleak voice hinted at the band's as yet unfathomed depths and danger just beneath the surface.
(7) The arrangement, perhaps tongue in cheek, offers an opportunity for him to reach an unfathomed note seemingly below the normal range of his trombone.
profound
unplumbed
unsounded
Possible