ἐκφλέγω
From LSJ
εἰς πέλαγος σπέρµα βαλεῖν καὶ γράµµατα γράψαι ἀµφότερος µόχθος τε κενὸς καὶ πρᾶξις ἄκαρπος → throwing seeds and writing letters at sea are both a vain and fruitless endeavor
English (LSJ)
A to set on fire: metaph., τὴν πόλιν Ar.Pax608, LXX 4 Ma. 16.3:—Pass., metaph., ἐκφλέγεσθαι τὴν διάνοιαν to be inflamed... Plu.2.766a. 2 warm up, Aret.SA2.1.
German (Pape)
[Seite 785] entzünden; auch übertr., πόλιν, zum Kriege, Ar. Pax 609; ἐκφλέγεται τὴν διάνοιαν Plut. amat. 20 M.