From Wiktionary, the free dictionary
From Ancient Greek ἐπί (epí, “upon, on”).
επί • (epí)
- (with genitive) on, upon
Δεν έχω τίποτα να πω επί του θέματος.- Den écho típota na po epí tou thématos.
- I have nothing to say on the matter.
- (mathematics) times