ἐπιδανείζω
From LSJ
ὁ γὰρ μανθάνων κιθαρίζειν κιθαρίζων μανθάνει κιθαρίζειν → he who is learning the harp, learns the harp by harping
English (LSJ)
A lend money on property already mortgaged, D.35.22, PPetr.3p.41 (iii B.C.); ἐ. ἐπὶ κτήμασι Arist.Oec.1347a1; ἱερατικὰς προσόδους ἐ. PGnom.184 (ii A.D.):—Med., borrow on property already mortgaged, D.34.6, Syngr. ap. eund.35.11: metaph., ἐπιδανείζεσθαι χρόνον παρὰ τῆς τύχης εἰς ἄδοξον βίον Plu.Brut.33.