Save Gender Masculine Usage Ancient Greek, Greek Mythology Scripts Ἀγασθένης(Ancient Greek) Meaning & History Means "very strong", derived from Greek ἄγαν (agan) meaning "very, much" and σθένος (sthenos) meaning "vigour, strength". This was the name of a king of Elis from Greek mythology, and of one of the Gigantes slain during the Gigantomachy.
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