δυσδιανόητος
From LSJ
Ἐς δὲ τὰ ἔσχατα νουσήματα αἱ ἔσχαται θεραπεῖαι ἐς ἀκριβείην, κράτισται → For extreme diseases, extreme methods of cure, as to restriction, are most suitable.
English (LSJ)
ον,
A hard to understand. Sch.E.Ph.30.
German (Pape)
[Seite 677] schwer einzusehen, Schol. Eur. Phoen. 30.