How does Circe trap Odysseus?

Circe traps Odysseus by using her magical powers to transform his crew into swine after they consume her enchanted food. When Odysseus arrives, Hermes provides him with a magical herb, moly, to protect him from her enchantments. With this protection, he confronts Circe, and after a night spent together, she agrees to return his crew to human form and helps them on their journey home. Ultimately, Circe does not trap Odysseus in a traditional sense; rather, she ensnares him with her charm and allure, leading to a prolonged stay on her island.