διακηρυκεύεσθαι
From LSJ
ξένῳ δὲ σιγᾶν κρεῖττον ἢ κεκραγέναι → it's better for a stranger to keep silence than to shout (Menander)
Greek > English (Woodhouse Verbs Reversed)
(see also: διακηρυκεύομαι) communicate with by herald, negotiate by heralds