ἐπιίστωρ

English (LSJ)

ορος, ὁ, ἡ,

   A privy to a thing: c.gen., μεγάλων ἔργων ἐ. privy to great works (i.e. the robbery of the mares), Od.21.26; so τεῶν μύθων ἐ. A.R.4.89: abs., ib.16.    2. acquainted with, practised in, δίσκων, γεωμετρίης, AP11.371 (Pall.), App.Anth.7.2 (Euc.); σοφίης IG3.946, cf. Doroth.in Cat.Cod.Astr.2.172.