The name Odysseus (Ὀδυσσεύς) means "trouble" in Greek, referring to both the giving and receiving of trouble—as is often the case in his wanderings. An early example of this is the boar hunt that gave Odysseus the scar by which Eurycleia recognizes him; Odysseus is injured by the boar and responds by killing it.
Odysseus' heroic trait is his mētis, or 'cunning intelligence.' He is often described as the "Peer of Zeus in Counsel." This intelligence is most often manifested by his use of disguise and deceptive speech. His disguises take forms both physical (altering his appearance) and verbal, such as telling the Cyclops Polyphemus that his name is Οὖτις, ''Nobody'', then escaping after blinding Polyphemus. When asked by other Cyclopes' why he is screaming, Polyphemus replies that "Nobody" is hurting him, so the others assume that "if alone as you are [Polyphemus] none uses violence on you, why, there is no avoiding the sickness sent by great Zeus; so you had better pray to your father, the lord Poseidon."
One flaw that Odysseus displays is that of arrogance and pride (or hubris). As he sails away from the island of the Cyclopes, he shouts his name and boasts that nobody can defeat the "Great Odysseus." The Cyclops then throws the top half of a mountain at him and prays to his father, Poseidon, saying that Odysseus has blinded him. This enrages Poseidon, causing the god to thwart Odysseus' homecoming for a decade.