voiceless

adjective

1. having no voice; dumb; mute
2. not speaking; silent
3. not spoken; not uttered: a voiceless wish
4. lacking a musical voice or the ability to sing
5. having no voice, or vote; lacking suffrage
6. Phonet. articulated without simultaneous vibration of the vocal cords; surd: said of certain consonants, as (p), (s), and (c̸h)