ἐξώνησις
From LSJ
διὸ πᾶσαι αἱ τέχναι καὶ αἱ ποιητικαὶ ἐπιστῆμαι δυνάμεις εἰσίν → hence all arts, i.e. the productive sciences, are potencies
English
redemption, purchase, buy-off, buying
German (Pape)
[Seite 891] ἡ, die Loskaufung, erst Sp.
Greek (Liddell-Scott)
ἐξώνησις: -εως, ἡ, = ὤνησις, Ἰωάνν. Ἱεροσ. 468Α, Σύγκελλ. 518. 8, κλ.