"¡Cállate!" or "Cállese", but the nature of the statement is not "formal".
shut up = cállate! (this is not polite)
To shut is cerrar. Past participle is cerrado.
Shut up hytg
It is not Spanish, but Italian; the Spanish would be te callas. It translates to: Shut up or shut it or you shut up.
cerrar
You could say "¡Cállate! Estoy tratando de aprender."
calletela-shut it or callete la boca -shut the mouth
Callate, chiquita! No, solamente bromeo.
Give them a hug and then say shut up or say your right now shut up!
you can say "suti" meaning shut up or "prekini" meaning stop now! or shut it
how to say shut in Fijian
Depending on whether you're talking to a male or a female, the Spanish for ugly is feo and fea respectively. The verb "to shut up" in Spanish is callarse, which must be conjugated into the imperative form when using it in this way, which would be callase. Therefore, assuming you're talking to a male, the Spanish for "shut up, ugly" is callase, feo.
Yamaza is how you say shut up in swahili. I asked my aunt, she speaks it.