light bulb, focus, center
Sabes que es un foco de enfermedades.
You know it's a hotbed of disease.
¿La falta de foco no la irritó?
Didn't the lack of focus irritate her?
— ¡Adiós Lenin! (2003)
Tom cogió un foco.
Tom picked up a spotlight.
Era buen mozo, pero ya está fuera de foco.
He was handsome, but he's out of focus now.
Te ves como si no pudieras cambiar un solo foco.
You look like you couldn't change a single light bulb.
— Fack ju Göhte (2013)