Mudo (en. Dumb)
/ˈmu.ðo/
Slang Meanings
In some contexts, it is used to describe someone who is very introverted.
That boy is very mute; he never says a word in class.
Ese chico es muy mudo, nunca dice una palabra en la clase.
In informal settings, it can refer to someone who does not participate in conversations.
He's always there at meetings, but he's totally mute.
Siempre está en las reuniones, pero es un mudo total.