unsounded
1. [ adjective ] situated at or extending to great depth; too deep to have been sounded or plumbed
Synonyms: unplumbed unfathomed profound
Examples:

"the profound depths of the sea" "the dark unfathomed caves of ocean"-Thomas Gray "unplumbed depths of the sea" "remote and unsounded caverns"

Related terms: deep
2. [ adjective ] not made to sound
Synonyms: silent
Examples:

"the silent `h' at the beginning of `honor'" "in French certain letters are often unsounded"

Related terms: inaudible
Similar spelling:   unsound
  uncompounded
  unsoundness
  unsoundable
  uncondensed
  unsanded
  unjointed
  uncounted
  unconfined
  unconfused
  unconsumed
  unconcerned
  unconfessed
  unconnected
  uncontested
  unconverted
  unconcealed
  unconcern
  unison
  unsown
  unsung
  unconquered
  uncontrived
  unconfirmed
  unconvinced
  uncongenial
  unconfident
  unkind