Read the excerpt then answer the question: "Her sister, Miss Watson, a tolerable slim old maid, with goggles on, had just come to live with her, and took a set at me now with a spelling-book. She worked me middling hard for about an hour, and then the widow made her ease up. I couldn't stood it much longer. Then for an hour it was deadly dull, and I was fidgety. Miss Watson would say, 'Don't put your feet up there, Huckleberry'; and 'Don't scrunch up like that, Huckleberry-set up straight'; and pretty soon she would say, 'Don't gap and stretch like that, Huckleberry—why don't you try to behave?'"

In at least one hundred words, explain how Twain uses descriptive adjectives to characterize Miss Watson in this excerpt.