δυσδιάγνωστος
From LSJ
Οὕτως ἔδειξέν μοι κύριος καὶ ἰδοὺ ἐπιγονὴ ἀκρίδων ἐρχομένη ἑωθινή, καὶ ἰδοὺ βροῦχος εἷς Γωγ ὁ βασιλεύς (Amos 7:1) → Thus the Lord showed me and look, early-morning offspring of locusts coming, and look, one locust-larva: Gog the king.
English (LSJ)
ον,
A hard to distinguish, Cic.Att.5.4.1, D.H.2.71, Gal.9.433, etc.
German (Pape)
[Seite 677] schwer zu unterscheiden, Dion. Hal. 2, 71.