la serrure
He successfully picked the lock.
Il a réussi à crocheter la serrure.
This key doesn't fit in the lock.
Cette clé ne rentre pas dans la serrure.
You have to change the lock on the door.
Vous devez changer la serrure de la porte.
Holmes went to the bureau first and looked hard at the lock.
Holmes se rendit d’abord au bureau et examina attentivement la serrure.