Read the dictionary definition of voiceless. All definitions for this word.
1. being without sound through injury or illness and thus incapable of all but whispered speech
2. uttered without voice
1. could hardly hear her breathed plea, `Help me'
2. voiceless whispers
3. deprived of the rights of citizenship especially the right to vote
1. labor was voiceless
2. disenfrenchised masses took to the streets
4. produced without vibration of the vocal cords
1. unvoiced consonants such as `p' and `k' and `s'