abrir la boca

open one's mouth

→ abrir
phrase Uncommon #9,521
open one's mouth Usually refers literally to opening the mouth, but can also mean to speak or say something depending on context. In "no abrir la boca," it means "not say a word."
SP: El dentista me pidió abrir la boca.
EN: The dentist asked me to open my mouth.

William, ¿vas a abrir la boca y sacar la lengua?

William, are you going to open your mouth and stick out your tongue?

— Ahora me ves 3 (2025)

Él no es capaz de abrir la boca delante de su padre.

He can't open his mouth in front of his father.

Aquí no se puede abrir la boca sin ser citado inmediatamente.

You can't open your mouth here without being immediately quoted.

Debes abrir la boca.

You must open your mouth.

— Hamnet (2025)

Y a ti te da pereza abrir la boca, una vez más.

And you can't be bothered to open your mouth, once again.

— ¡Kin-Dza-Dza! (1986)

No debes abrir la boca.

You shouldn't open your mouth.

— Comer, beber, amar (1994)

Esto me incumbe, ¿y no puedo abrir la boca?

This concerns me, and I can't open my mouth?

— Lagaan: Érase una vez en la India (2001)