ἰσόμαχος
From LSJ
ξένος ὢν ἀκολούθει τοῖς ἐπιχωρίοις νόμοις → as a foreigner, follow the laws of that country | when in Rome, do as the Romans do
English (LSJ)
ον,
A equal in the fight, D.H.3.52; ἀρετή, κίνδυνος, D.S.16.12, 17.83: τισι Ant.Lib.14.2.
German (Pape)
[Seite 1265] in der Schlacht gleich, einander gewachsen, D. Hal. 3, 52; κίνδυνος, gleiche Gefahr, D. Sic. 17, 83.