τυφὼς γὰρ ἐκβαίνειν παρασκευάζεται → a hurricane is getting ready to burst
adv.
P. and V. φαύλως, P. ἐξ ἐπιδρομῆς, ἐξ ὑπογυίου. Devise impromptu, v.: P. αὐτοσχεδιάζειν (acc.).