δυσθεώρητος

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.