Voice"less, a.
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 voice; as, a voiceless consonant; surd.
Voiceless stop Phon., a consonant made with no audible sound except in the transition to or from another sound; a surd mute, as p, t, k.
-- Voice"less*ly, adv. -- Voice"less*ness, n.
© Webster 1913.