voiceless

adjective

1. produced without vibration of the vocal cords"unvoiced consonants such as ‘p’ and ‘k’ and ‘s’"
2. deprived of the rights of citizenship especially the right to vote"labor was voiceless"
3. uttered without voice"could hardly hear her breathed plea, ‘Help me’"
4. being without sound through injury or illness and thus incapable of all but whispered speech