#asebeia

[templehyacinthus]

"The Greeks had no single word for religion. Theous sebasthai — to be in aw of the gods, to feel and express respect for them — is probably the best approximation for what we loosely call religion. The noun sebas implies a combination of awe, respect, and reverance. Eusebia — proper or right observance of sebas — is often translated as piety but more precisely means "doing the right or proper thing." Impiety, asebeia, is lack or denial of respect for the gods"

- Greek Religion: A Sourcebook, by Valerie M. Warrior (pg. ix)

[theoxenia]

There is a Classical Greek word that corresponds broadly to the English term ‘impiety’: asebeia. [...] In the pseudo-Aristotelean On Virtues and Vices we find an explicit definition of asebeia as ‘error (plemmeleia) concerning gods and daimons or concerning the departed, and parents and homeland’. Polybios provides a very similar definition: ‘Asebema is to do harm in matters concerning the gods, parents and the dead’.

"Impiety" by Hugh Bowden, in The Oxford Handbook Of Ancient Greek Religion edited by Esther Eidinow and Julia Kindt