ἄλογον δὴ τὸ μήτε μάχης ἄρξασθαι μήτε τοὺς φίλους φυλάξαι, ἐὰν ὑπό γε τῶν βαρβάρων ἀδικῆσθε → It is irrational neither to begin battle nor to guard the friends, if you are ever wronged by the foreigners
prŏtervē: adv., v. protervus.
prŏtervē¹⁴ (protervus), effrontément, impudemment, sans retenue : Ter. Hec. 503 ; Cic. Rep. 1, 68