mute

(noun) a deaf person who is unable to speak. Synonyms: deaf-mute, deaf-and-dumb person.

(noun) a device used to soften the tone of a musical instrument.

(verb) deaden (a sound or noise), especially by wrapping. Synonyms: muffle, dull, damp, dampen, tone down.

(adj) expressed without speech. Synonyms: tongueless, unspoken, wordless. Examples: "A mute appeal." "A silent curse." "Best grief is tongueless"- emily dickinson." "The words stopped at her lips unsounded." "Unspoken grief." "Choking exasperation and wordless shame"- thomas wolfe."

(adj) unable to speak because of hereditary deafness. Synonyms: dumb, silent.