(n.) The condition, state, or habit of being mute, or without speech.

anaudia aphonia aphrasia deaf-muteness dumbness dysarthria dysphasia echolalia hysterical aphonia imperfect speech inarticulateness incoherence jargon aphasia loss of speech motor aphasia muteness mutism paranomia paraphasia psychophonasthenia speech defect speechlessness tonguelessness verbigeration voicelessness wordlessness