ἀκατάβλητος
From LSJ
εἰ δὲ τύχῃ τις ἔρδων, μελίφρον' αἰτίαν ῥοαῖσι Μοισᾶν ἐνέβαλε → if someone is successful in his deeds, he casts a cause for sweet thoughts into the streams of the Muses
English (LSJ)
ον,
A irrefragable, λόγος Ar.Nu.1229. II not to be thrown down, πύργοι Sch.E.Hec.1.
Greek (Liddell-Scott)
ἀκατάβλητος: -ον, ὁ μὴ καταβαλλόμενος, λόγος, Ἀριστοφ. Νεφ. 1229.