clear sky; air
Ancient Greek word, found 43 times in the texts on Socratos.
Homer, Iliad 17.646: ποίησον δʼ αἴθρην, δὸς δʼ ὀφθαλμοῖσιν ἰδέσθαι·
Homer, Odyssey 6.44: δεύεται οὔτε χιὼν ἐπιπίλναται, ἀλλὰ μάλʼ αἴθρη
Euripides, Heracleidae 208: Αἴθρα, πατὴρ δʼ ἐκ τῆσδε γεννᾶται σέθεν
All forms of αἴθρη