One night by the fire, Ayra recites her list of names loud enough to disturb the Hound's sleep. He asks her if she plans to name every person in Westeros, and she replies: "Only the ones I'm going to kill." He nods his consent and says, "Hate's as good a thing as any to keep a person going. Better than most." Then he adds that should his brother cross their paths, both of them could cross a name off their kill lists. He tells Arya to finish her litany of doomed men, and she completes her chant by saying, "The Hound."
The next day, Clegane finds Arya practicing her water dancing alongside a stream. Naturally, he teases her for the effort and provokes her into sharing that she learned the style from Syrio Forel, who was murdered by Meryn Trant. The Hound counters that her teacher couldn't have been any good if he lost his life to Ser Meryn and invites Arya to attack him. When her sword fails to pierce his armor, he backhands her and takes her sword. "Your friend's dead and Meryn Trant's not because Trant had armor and a big f*cking sword," reminding her she should learn from her mentor's mistakes rather than remain loyal and repeat them.