ἀτέρμων
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)
ον, gen. ονος,
A without bound or end, αἰών Arist.Mu.401a16; ὕπνος Mosch.3.104; ἐνόπτρων ἀ. αὐγαί the mirror's countless rays, E.Hec.926; ἀ. πέπλος having no end or issue, inextricable, A.Eu.634.
German (Pape)
[Seite 385] ον (τέρμα), ohne Gränzen, ohne Ende, πέπλος Aesch. Eum. 604, ohne Ausgang; ἀτέρμονες αὐγαὶ χρυσέων ἐνόπτρων Eur. Hec. 903, nach Herm. außerordentlich glänzender, blendender Schein der Metallspiegel; Andere erkl. runde.