Having no voice, utterance, or vote; silent; mute; dumb.

of speech sounds

uttered without voice; "could hardly hear her breathed plea, `Help me'"; "voiceless whispers"

Not sounded with voice; as, a voiceless consonant; surd.

not using the voice; "unvoiced thoughts"; "unvoiced consonants such as `p' and `k' and `s'"

See unvoiced.

A sound whose production does not involve vibration of the vocal chords, as in [p, t, k, f, s].

ˈvɔjsləs] - adjective for sounds made without vocal fold vibration.