What do you call a person that will not speak until you speak?

[Anonymous]

My dad does that to everyone. Especially my mother... He would come in the house and not speak to anyone until you spoke first. Is that weird?

[Marshymallow]

I mean, silence can be awkward sometimes so I try to speak up if no one does. But I get it, sometimes you just don’t wanna talk

[OlderThanILook]

I do that too tbh. I hate my voice, so I don't talk.

[ohsheeT]

Silly very silly