[Hideyoshi blinks only for a moment. Ordinarily he'd be baffled at someone asking what a horse is, but it seems perfectly logical that what's obvious to him would be confusing to someone else, considering that the opposite has been happening all the time since his arrival.]

A horse is this... big animal, about yay big? [He holds his hand up as high as he can reach, although since he's short, that comes out a rather small horse.] Four legs, hoofs, long neck... sometimes they're good for riding. Sometimes they just stink.