unsounded

Definitions of unsounded
  1. adjective
    not made to sound
    “in French certain letters are often unsounded
    synonyms: silent
    inaudible, unhearable
    impossible to hear; imperceptible by the ear
  2. adjective
    situated at or extending to great depth; too deep to have been sounded or plumbed
    “remote and unsounded caverns”
    synonyms: profound, unfathomed, unplumbed
    deep
    having great spatial extension or penetration downward or inward from an outer surface or backward or laterally or outward from a center; sometimes used in combination
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