μῆρα
From LSJ
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
English (LSJ)
τά, old pl. of
A μηρός 2, = μηρία, Il.1.464, al., B.Fr.3.4, Ar.Pax 1088; Ποσειδάωνι . . πόλλ' ἐπὶ μῆρ' ἔθεμεν Od.3.179.