ἐπέμψατε ἀγγέλους τοῖς ἀλλήλοις ὥστε ἔγνωτε τὸν κίνδυνον → you sent messengers to one another so that you knew the danger
P. and V. ἐφήμερος (Plato).
short-lived: P. βραχύβιος (Plato).
lasting a short time: P. ὀλιγοχρόνιος.
fleeting: P. and V. πτηνός (Plato).