to a stranger
He treated me like a stranger.
You brought a stranger home.
— Oldboy: Cinco días para vengarse (2003)
Nunca le abras la puerta a un extraño, sobre todo si estás solo en casa de noche.
Never open the door to a stranger, especially if you are home alone at night.
Vi entrar a un extraño a esa casa.
I saw a stranger enter that house.
Me cuido mucho de dar mi correo a un extraño.
I’m very careful about giving my email address to a stranger.
Al principio me trató como a un extraño, pero con el tiempo nos hicimos buenos amigos.
At first he treated me like a stranger, but over time we became good friends.
Quisiera salir a la calle y hablarle sobre mí a un extraño.
I'd like to go out on the street and talk about myself to a stranger.
— Un día especial (1977)
Le contó su vida entera a un extraño en el tren como si lo conociera de toda la vida.
He told his entire life story to a stranger on the train as if he had known him all his life.
Me miró como se mira a un extraño, como si nunca nos hubiéramos conocido antes de ese día.
He looked at me like you would at a stranger, as if we had never met before that day.