lock
The French word 'verrou' is a noun that refers to a locking device, typically used to secure a door or a gate. It can also be used figuratively to refer to a situation that is blocked or unable to progress. In French, the verb 'verrouiller' means 'to lock' or 'to secure'.
The door lock is broken.
In this sentence, 'Le verrou de la porte est cassé', the term 'verrou' is used to denote the lock of a door. The whole phrase translates to the broken condition of the door lock.
I can't find the key to the lock.
Here, 'Je ne peux pas trouver la clé du verrou' makes use of the term 'verrou' to refer to a lock for which the key cannot be found, implying need for the key to either unlock or lock it.
He forgot to lock the door.
In the phrase 'Il a oublié de verrouiller la porte', the word 'verrou' is used as a verb 'verrouiller' meaning to lock. It indicates the forgetfulness of a person in securing the door.