φρουρεῖσθαι

From LSJ

ἐβόα καὶ βαρβαρικῶς καὶ Ἑλληνικῶς → shouted out both in Persian and Greek, shouted out in the barbarian tongue and in Greek

Source

Greek > English (Woodhouse Verbs Reversed)

(see also φρουρέω): beware of, guard against