Etymology of the Greek word epistole (ἐπιστολή)
the Greek word epistole, ἐπιστολή (a written message)
derived from the Greek word stellein, στέλλω (to send)
derived from the Proto-Indo-European root *stel-
derived from the Greek word epistellein, ἐπιστέλλω (to enjoin (by writing); (genitive case) to communicate by letter (for any purpose))