δυσκαταμάχητος
From LSJ
τί ἦ μοι ταῦτα περὶ δρῦν ἢ περὶ πέτρην → but what is this to me, about an oak or a rock | but what are these things about a tree or a rock to me | why all this about trees and rocks | why all this about what we have nothing to do with | but why am I off on this tangent
English (LSJ)
[μᾰ], ον,
A hard to overcome, D.S.3.35; νόσος (sc. πενία) Lib.Decl.34.4.
German (Pape)
[Seite 682] schwer zu bekämpfen, D. Sic. 3, 35; auch von Krankheiten, Medic.
Greek (Liddell-Scott)
δυσκαταμάχητος: -ον, δυσκόλως καταβαλλόμενος, δυσκατανίκητος, Διόδ. 3. 35.