Odysseus spares the cyclops Polyphemus' life, rather than risk further casualties.
He also spares Circe's life in exchange for her promising to do no harm to him and go to bed with him.
When he gets back to Ithaca, he spares Phemius the minstrel, and Medon the herald.
Odysseus spares Phemios and Medon
Odysseus spares the lives of the minstrel Phemius and Medon the herald.
Tiresias.
Tiresias
he kills antinous
Odysseus spares the lives of two of the suitors, Phemios and Medon, because they were not as cruel and abusive as the others. Phemios was a bard who entertained the suitors, and Medon was a loyal servant who tried to help protect Telemachus. Odysseus showed mercy towards them for their lesser involvement in the suitors' misdeeds.
None of the suitors' lives are spared; Odysseus and his party kill them all. Odysseus does spare Phemius the minstrel, and Medon the herald.
The suitor that Telemachus asked Odysseus to spare was Phemius, the bard in the palace who was forced to perform for the suitors against his will. Telemachus pleaded for his life because he had not participated in the suitors' greed or disrespect towards Odysseus.
Calypso
he kills antinous
All of the gods except Poseidon have agreed to spare Odysseus's life.
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