Which one-eyed giant does Odysseus blind?

The one-eyed giant blinded by Odysseus is Polyphemus. He is a Cyclops, a man-eating giant who traps Odysseus and his crew inside his cave in Book 9 of The Odyssey.

Polyphemus is the son of Poseidon, god of the sea, and the sea nymph Thoosa. After trapping the sailors, he eats several of them and blocks the cave entrance with an enormous stone. Odysseus devises a plan: he gives the giant strong wine, tells him that his name is “Nobody,” and then drives a sharpened, heated wooden stake into his single eye while he sleeps.

When other Cyclopes hear Polyphemus calling for help from “Nobody,” they misunderstand him and leave. The next morning, Odysseus and his surviving men escape by clinging beneath the giant’s sheep. Odysseus later reveals his real name while sailing away, allowing Polyphemus to identify him and ask Poseidon for revenge. That boast helps explain why the journey home becomes so difficult. Charybdis is a deadly whirlpool, while the Laestrygonians are cannibalistic giants; neither is the Cyclops Odysseus blinds.