Eurylochus.
She changed his men into swine (pigs).
Circe is a sorceress, she enchants Odysseus and turns men into pigs, although she doesn't do this to Odysseus (lucky man) she does it to his remaining soldiers. So it is the enchantment that keeps him on the island,
Circe turned Odysseus' men Into swine.
circe sends odysseus to the underworld
There is no mention of a compass in Circe's gifts to Odysseus.
Circe realizes that Odysseus is a man of great power and intelligence when he resists her magic and speaks to her as an equal, demonstrating his cunning and wit. She eventually discovers his true identity as the great warrior Odysseus when he reveals his name and background to her. This realization marks a turning point in their relationship as Circe begins to help Odysseus on his journey home.
Hermes warned Odysseus about Circe's magic.
Circe was opening the door of her estate for Odysseus.
Circe turns Odysseus' men into swine.
Odysseus' crew men ask Odysseus to leave Circe's island after a year on her island.
the dangers that he would face at sea that is what circe warned odysseus.