1. 
   Voiceless
   Voice'less adjective 1. Having no voice, utterance, or vote; silent; mute; dumb. « I live and die unheard, With a most voiceless thought, sheathing it as a sword.» Byron. 2. (Phon.) Not sounded with vo...
   Found op http://www.encyclo.co.uk/webster/V/33
   
   
2. 
   Voiceless
   • (a.) Not sounded with voice; as, a voiceless consonant; surd. • (a.) Having no voice, utterance, or vote; silent; mute; dumb.
   Found op http://thinkexist.com/dictionary/meaning/voiceless/
   
   
3. 
   voiceless
   1) Surd 2) Unvoiced
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/voiceless/1
   
   

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