ἐπίσταλμα
From LSJ
ἑὰν δὲ προσποιούμενος ᾗ τὰ μαθήματά πως ἀπείρως προβάλλων, οὐκ ἔστιν αἰτίας ἔξω → But should one profess knowledge as he puts forward something in an inexperienced way, he is not without blame (Pappus 3.1.30.31f.)
English (LSJ)
ατος, τό, ἐπιστέλλω)
A commission, Thphr.Char.5.8. II. official communication or order, PFay.26.4 (ii A.D.), Wilcken Chr.42.3, 8 (iv A.D.), Cod.Just.7.37.3.1c: pl., of Imperial letters, Just. Nov.167.1.
German (Pape)
[Seite 982] τό, das Aufgetragene, der Befehl, Sp.
