ἔξαψις σφοδρὰ μετὰ πολλῆς βίας πίπτουσα ἐπὶ γῆς → a violent flare-up falling on the ground with great force, thunder and lightning
Ar. and P. ξιφίδιον, τό, P. ἐγχειρίδιον, τό, P. and V. μάχαιρα, ἡ.