Adjective voiceless has 4 senses
  1. surd, voiceless, unvoiced - of speech sounds
  2. unvoiced, voiceless - not using the voice; "unvoiced thoughts"; "unvoiced consonants such as `p' and `k' and `s'"
  3. breathed, voiceless - uttered without voice; "could hardly hear her breathed plea, `Help me'"; "voiceless whispers"
    Antonyms: audible, hearable (indirect, via inaudible)
  4. aphonic, voiceless - being voiceless through injury or illness and thus incapable of all but whispered speech
    Antonym: articulate (indirect, via inarticulate)
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