ἐπέμψατε ἀγγέλους τοῖς ἀλλήλοις ὥστε ἔγνωτε τὸν κίνδυνον → you sent messengers to one another so that you knew the danger
subs.
P. and V. τάχος, τό, V. ταχύτης, ἡ, V. ὠκύτης, ἡ.