κενοφροσύνη
From LSJ
Καὶ μὴν ὑπεραποθνῄσκειν γε μόνοι ἐθέλουσιν οἱ ἐρῶντες, οὐ μόνον ὅτι ἄνδρες, ἀλλὰ καὶ αἱ γυναῖκες. → After all, it is only those in love who are actually willing to die for another — not just men, but women as well. (Plato, Symposium 179b)
English (LSJ)
and κενό-φρων, v. κενεοφρ-.
German (Pape)
[Seite 1417] ἡ, übler Sinn, leerer Wahn; Plut. Ages. 37; Phot. erkl. ματαιοφροσύνη.