This is the 10124th most frequent Spanish word.
cerradura
Lock.
In this sentence, 'cerradura' refers to the piece of hardware that secures the door.
La cerradura de la puerta está rota.
The lock of the door is broken.
Here, 'cerradura' denotes the mechanism used for locking the chest.
Necesito una llave para la cerradura del cofre.
I need a key for the chest's lock.
'Cerradura' in this context specifies the locking device intended for the window.