δυσθεώρητος
From LSJ
Ὁ μὲν βίος βραχύς, ἡ δὲ τέχνη μακρή, ὁ δὲ καιρὸς ὀξύς, ἡ δὲ πεῖρα σφαλερή, ἡ δὲ κρίσις χαλεπή → Life is short, art long, opportunity fleeting, experience misleading and judgment difficult
English (LSJ)
ον,
A hard to observe, Arist.HA511b13; scarcely visible, τρύπημα Hero Spir.1.31, cf. Philum.Ven.15.6. II hard to understand or reduce to theory, τέχνη Ph.Bel.49.19, cf. Plb.3.31.7, Phld.Rh.1.141 S., Ph.2.84.
German (Pape)
[Seite 681] schwer zu untersuchen, zu betrachten; Arist. H. A. 3, 2; Pol. 17, 13 u. sonst; Plut. S. N. V. 4.
Greek (Liddell-Scott)
δυσθεώρητος: -ον, ὃν δύσκολον εἶναι νὰ θεωρήσῃ τις ἢ ἐννοήσῃ, Ἀριστ. Ἱστ. Ζ. 3. 2, 2.