aphonic

adjective

1. mouthed but not spoken; noiseless; silent.
2. Phonetics.
   1. lacking phonation; unvoiced.
   2. without voice; voiceless.
3. Pathology. affected with aphonia.

noun

4. Pathology. a person who is affected with aphonia.

adjective

1. affected with aphonia
2. phonetics
   1. not representing a spoken sound, as k in know
   2. voiceless or devoiced