ἐπιφθέγγεσθαι

From LSJ

ἄνω ποταμῶν ἱερῶν χωροῦσι παγαί → the springs of sacred rivers flow upward, backward to their sources flow the streams of holy rivers

Source

Greek > English (Woodhouse Verbs Reversed)

(see also ἐπιφθέγγομαι): sound of a trumpet