Throughout the journey with the Cyclopes, we learn that Odysseus is pretty clever with defeating the monster. First, to take out the Cyclopes, he gives him wine to make him drunk so that he will be easier to defeat. Then, he tells the monster that his name is Nobody. This works out because, when he attacks and the Cyclopes calls out for helps he says, "Nobody is hurting me" so the other Cyclopes think he's fine.