cyperos

ἐπέμψατε ἀγγέλους τοῖς ἀλλήλοις ὥστε ἔγνωτε τὸν κίνδυνον → you sent messengers to one another so that you knew the danger

Latin > English (Lewis & Short)

cypērŏs: i, m. (cypērum, i, n., Varr. R. R. 3, 16, 13), = κύπειρος,
I a kind of rush, Plin. 21, 18, 70, §§ 117 and 118.