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