διαποστολή
From LSJ
περὶ οὐδὲν γὰρ οὕτως ὑπάρχει τῶν ἀνθρωπίνων ἔργων βεβαιότης ὡς περὶ τὰς ἐνεργείας τὰς κατ' ἀρετήν → since none of man's functions possess the quality of permanence so fully as the activities in conformity with virtue
English (LSJ)
ἡ,
A sending of messages, Plb. 5.37.3 (pl.), OGI248.58 (ii B.C.); πρεσβειῶν D.H.7.12.
Greek (Liddell-Scott)
διαποστολή: ἡ, ἀμοιβαία ἀποστολὴ ἀγγέλων, Πολύβ. 5. 37, 3, κτλ.