mute
US /mjuːt/
UK /mjuːt/

1.
refraining from speech or temporarily speechless
:
•
He remained mute after the shocking news.
•
The witness was struck mute by fear.
2.
unable to speak, typically as a result of a congenital defect or illness
:
•
She was born mute and communicated through sign language.
•
The accident left him permanently mute.
1.
a person who is unable to speak
:
•
The old man, a lifelong mute, communicated with his eyes.
•
She learned sign language to speak with her mute brother.