su llave

his/her key

→ su
phrase Uncommon #13,324
his/her key su can mean his, her, your, or their depending on context.
SP: ¿Dónde está su llave?
EN: Where is his/her key?

Tom pudo haber dejado su llave del auto en la habitación de Mary.

Tom may have left his car key in Mary's room.

Necesitamos su llave.

We need your key.

Encontró su llave y abrió la puerta.

He found his key and opened the door.

Tom parece haber perdido su llave.

Tom seems to have lost his key.

Tiene el Sr. Harry Potter su llave?

Does Mr. Harry Potter have his key?

— Harry Potter y la piedra filosofal (2001)

Tom tenía miedo de haber perdido su llave.

Tom was afraid he had lost his key.

Cada una tiene su llave.

Each one has its key.

Tom me dio su llave.

Tom gave me his key.

Tom no pudo encontrar su llave por ningún lado.

Tom couldn't find his key anywhere.

Me pregunto dónde escondió Tom su llave.

I wonder where Tom hid his key.

Tom tenía su llave colgando en una cadena alrededor de su cuello.

Tom had his key hanging on a chain around his neck.