διακηρυκεύεσθαι

From LSJ

χρόνῳ μὲν ἀγρεῖ Πριάμου πόλιν ἅδε κέλευθος → in time this expedition will capture the city of Priam

Source

Greek > English (Woodhouse Verbs Reversed)

(see also: διακηρυκεύομαι) communicate with by herald, negotiate by heralds

Lexicon Thucydideum

per caduceatorem agere, to negotiate through a herald, 4.38.2.