Definitions:
refraining from speech or temporarily speechless

(of a person) lacking the faculty of speech.

(of a letter) not pronounced

a device on a television, telephone, or other appliance that temporarily turns off the sound.

a clamp placed over the bridge of a stringed instrument to deaden the resonance without affecting the vibration of the strings.

a person lacking the faculty of speech.

deaden, muffle, or soften the sound of

turn off (a microphone or the audio on an electronic device), especially temporarily

a pack of hounds