Harry snorts. "The letters represent the shapes of a snake’s contorting body. It’s wiggly because snakes are wiggly. This letter," Harry says, writing out the coiled shape of a snake reared back and preparing to strike, seen from the side, very similar in shape to an S. "-means attack, or venom, or kill, depending on the context of the letters around it. This one," An upright spiral, symbolising the coiled-up body of the snake. "-means sleep, rest, home, it can even mean death depending on the context."