Why is this the answer?

The answer is sword because this clever riddle uses fun word pictures to describe an amazing and historic weapon used long ago by knights and warriors. Let's look at the first two clues together: "With sharp edged wit and pointed poise." These clues are a little bit of a trick! "Wit" and "poise" are words we usually use to describe a smart and graceful person, but here, the riddle is talking about the shape of the object. Think about a shiny, sharp sword. It has a very sharp edge all along the side, which is what the riddle means by "sharp edged wit." This is like saying the sword is sharp in its mind and on its body. And it has a very pointy end, which is the "pointed poise." The word "poise" means balance and grace, which is exactly how a skilled sword fighter holds the weapon, balanced and ready. It is a wonderful way to give the sword a personality, even though it is just a piece of metal and wood. Now, let's look at the second, and trickiest, part of the riddle: "It can settle disputes without making a noise." A "dispute" is just another word for a big argument or a serious fight. Long, long ago, when knights or soldiers had a major disagreement, they might use their swords in a duel or battle to try and "settle" the problem. The sword itself doesn't make any sound like a person talking, yelling, or complaining. But when a warrior draws a sword, the argument is often finished very quickly. The simple act of drawing the blade can stop all the talking, making the resolution, or the "settling" of the dispute, happen suddenly and silently. The sword's presence or action ends the debate without a word, proving that sometimes the quietest things can be the most powerful.