to silence ourselves, to keep quiet
Ahora tenemos que callarnos.
Now we have to be quiet.
— Victoria (2015)
Teníamos que aceptarlo y callarnos.
We had to accept it and keep quiet.
— Uno de los nuestros (1990)
Deberíamos callarnos.
We should shut up.
Hemos decidido callarnos.
We've decided to keep quiet.