σκοτεινότης
From LSJ
Δελφῖνα νήχεσθαι διδάσκεις: ἐπὶ τῶν ἐν ἐκείνοις τινὰ παιδοτριβούντων, ἐν οἷς ἤσκηται → Teaching dolphins to swim: is applied to those who are teaching something among people who are already well versed in it
English (LSJ)
ητος, ἡ,
A darkness, obscurity, Pl.Sph.254a.
German (Pape)
[Seite 905] ητος, ἡ, Finsterniß, Dunkelheit, Plat. Soph. 254 a u. Sp.
