κενοφροσύνη
From LSJ
Ἀναβάντα γὰρ εἰς τὴν ἀκρόπολιν, καὶ διὰ τὴν ὑπερβολὴν τῆς λύπης προσκόψαντα τῷ ζῆν, ἑαυτὸν κατακρημνίσαι → For he ascended the acropolis and then, because he was disgusted with life by reason of his excessive grief, cast himself down the height
English (LSJ)
and κενό-φρων, v. κενεοφρ-.
German (Pape)
[Seite 1417] ἡ, übler Sinn, leerer Wahn; Plut. Ages. 37; Phot. erkl. ματαιοφροσύνη.