a wall
Y tiene una mano como si se hubiera peleado con una pared.
And his hand looks like he'd been fighting with a wall.
— Río Místico (2003)
¡Cuidado, hay una pared de granito detrás de ti!
Watch out, there's a granite wall behind you!
— Las Travesuras de una Sirena (2016)
Si le hubiera pegado a una pared, se habría sentido igual.
If he had hit a wall, he would have felt the same.
Hablar con él es como hablar con una pared.
Talking to him is like talking to a wall.