He didnt want to scare them so they wouldn't leave.
The Underworld and then through the Harpies and sea monsters; Scylla and Charybdis.
Odysseus did not warn hiscrew about Scylla because he was afraid they would all hide under the decks and not fight the monster. He needed them to be brave, so they could escape the narrow passage between Scylla and Charybdis
Calypso allows Odysseus to leave her island after Athene asks Zeus to tell Calyspo that if she doesnt allow Odysseus to leave her island that if she doesnt that Zeus will strike her with a thunderbolt and kill her as he is not a prisoner to her island and need to get home to be with Penelope (his wife). Zeus sends Hermes the messenger God to tell Calypso. Although Calypso is furious and doesnt want Odysseus to leave, she lets him because obviously she doesnt want to die so she helps him build a raft and gives him gifts for his journey home.
If you analyze Odysseus you will find that he is prideful and cocky. In this case, we see Odysseus push aside his intelligence with his pride. He doesnt want to tell his crew that he needed help.
To make sure that his crew stay calm and not think that he's crazy to go up against a giant snake and whirlpool
Before leaving Circe's island, Odysseus must journey to the Land of the Dead to consult with the blind prophet Tiresias.
By keeping the knowledge to himself he likely saved most his men, save the six that were lost to Scylla, as a ship divided as his men would have been would not have made it at all.
So they did not become scared and decide to turn back. By the time they reached Scylla, all of the men were focused on Charybdis (the whirlpool), and did not have time to worry about being eaten by Scylla until it was too late.
So they did not become scared and decide to turn back. By the time they reached Scylla, all of the men were focused on Charybdis (the whirlpool), and did not have time to worry about being eaten by Scylla until it was too late.
Kill the suiters
Odysseus did not tell the cyclops his name cyclops promised him a gift