en su apartamento

in his apartment

→ en
phrase Rare #31,578
in his apartment su can mean his, her, or their depending on context.
SP: Dejé mis llaves en su apartamento.
EN: I left my keys in his apartment.

Un vecino debe de haber colocado esta compra en su apartamento por él.

A neighbor must have placed this purchase in his apartment for him.

— It's Such a Beautiful Day (2012)

He estado en su apartamento.

I've been to his apartment.

— Ghost in the Shell (1995)

Félix tenía un gran perro en su apartamento.

Felix had a large dog in his apartment.

Tom está en su apartamento.

Tom is in his apartment.

Solía vivir con Tom en su apartamento.

I used to live with Tom in his apartment.

Y en su apartamento no está.

And he isn't in his apartment.

— Mujeres al borde de un ataque de nervios (1988)

Se ahorcó en su apartamento.

He hanged himself in his apartment.

— Whiplash (2014)

Quiere saber quién está en su apartamento.

He wants to know who is in his apartment.

— Mulholland Drive (2001)

Me dijo que lo viera en su apartamento.

He told me to meet him at his apartment.