ἐπιταλαιπωρέω
From LSJ
αὐτὸν κέκρουκας τὸν βατῆρα τοῦ λόγου → you have struck the very threshold of the argument, you have struck the most important and chiefmost point
English (LSJ)
A suffer or labour at, Th.1.123 ; πρὸς πολιτικοῖς Pl. R.540b ; ἔργοις J.AJ17.13.3. 2 labour yet further, D.H.9.35.
German (Pape)
[Seite 989] dabei, noch dazu Mühsal bestehen, sich anstrengen, περὶ τῶν μελλόντων τοῖς παροῦσι βοηθοῦντας χρὴ ἐπιταλ. Thuc. 1, 123; πρὸς πολιτικοῖς, Mühen übernehmen, Plat. Rep. VII, 540 b.