I just finished reading OotP and had a question, wondering if anyone here can answer it.
In the Dept. of Mysteries, Dolohov is hit with the Silencio spell. He then makes a "slashing" motion with his wand that knocks Hermione unconscious. Madam Pomfrey later says it would've done more damage had he been able to say the spell.
But, he obviously regained the power of speech quite soon, for he puts the Tarantellegra charm on Neville. Immediately after that, he again casts that spell with the "slashing" motion, which Harry blocks, and I think he does it once more after that, but definitely that one time. Even though he can speak, however, he just makes the wand motion, doesn't say anything. I'm confused.
Does anyone know what spell exactly that is that he casts? (i.e. what words go along with it?) Or does it not have any words and Madam Pomfrey was mistaken? If it had words, why didn't he say then when he could speak? Thanks!