Abstract
The article starts with two uses presented by Plato concerning the etymology of
Hades' name. In the Phaedo, he follows the tradition and interprets the name as the 'in-visible'.
In the Cratylus, on the other hand, he proposes a new reading of Hades as the 'all-knowing'.
Despite this inconsistency, there is an anterior coherence in regard to the project of extinguishing
the fear of death in the tradition. To understand these differences and similarities we recur to
the Republic. In this dialogue, there is a political motivation to extinguish the fear of death
amongst citizens. Fearing death would be prejudicial for their brave behaviour in battles. We also
found a concession to the manipulative use of the etymologies in order to correct illusory beliefs
of the people. These are taken as evidence that the superficial variation on the use of the etymologies of Hades is consistent if read under the framework of a political project.
Nevertheless, this is not exempt from moral questions. One may ask if this kind of manipulation
remains to be seen as wrong, who would be allowed to do it and in which cases. It follows an
attempt to find Plato's answer to these questions and a discussion with the contemporary
literature on the subject.