locked
Mantuve la puerta cerrada con llave.
I kept the door locked.
Intenté abrir la puerta, pero no pude porque estaba cerrada con llave.
I tried to open the door, but I couldn't because it was locked.
Tom trató de meterse a la habitación cerrada con llave.
Tom tried to get into the locked room.
It is locked.
Asegúrate de que la puerta esté cerrada con llave antes de salir.
Make sure the door is locked before you leave.