ὅπους

From LSJ

ἔξαψις σφοδρὰ μετὰ πολλῆς βίας πίπτουσα ἐπὶ γῆς → a violent flare-up falling on the ground with great force, thunder and lightning

Source

Greek (Liddell-Scott)

ὅπους: -ερις, Λατ. opus, = ἔργον, Πλουτ. Ρωμ. 16.