ἀπαιτεῖν
From LSJ
ἐπέμψατε ἀγγέλους τοῖς ἀλλήλοις ὥστε ἔγνωτε τὸν κίνδυνον → you sent messengers to one another so that you knew the danger
Greek > English (Woodhouse Verbs Reversed)
(see also ἀπαιτέω): request, ask as a request, ask back, ask for, ask to do a thing, demand back, entreat something of a person
Lexicon Thucydideum
repetere, to seek again, demand back, 3.113.5, 4.23.1, 4.99.1, 5.35.4, 5.44.3, 8.84.2.