Unsounded in a sentence as an adjective

Over unsounded gorges, through the rifled hearts of mountains, under torrents’ beds, unerringly I rush! Naught’s an obstacle, naught’s an angle to the iron way!"

Unsounded definitions

adjective

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"

See also: profound unfathomed unplumbed

adjective

not made to sound; "the silent `h' at the beginning of `honor'"; "in French certain letters are often unsounded"

See also: silent