ἔφεκτος
From LSJ
ἑτέρως ἠδύνατο βέλτιον ἢ ὡς νῦν ἔχει κατεσκευάσθαι → otherwise they could have been constructed better than they are now (Galen, On the use of parts of the body 4.143.1 Kühn)
English (LSJ)
ον,
A containing 1 + 1/6, Vitr.3.1.6; τόκος ἔ. when 1/6 of the principal was paid as interest, = 16 2/3 %, D.34.23: ἔφεκτον, τό, charge of 1/6 on payments for grain-transport, PLond.ined.2093 (iii B.C.).
German (Pape)
[Seite 1114] ein Ganzes u. ein Sechstel enthaltend (7/6), τόκος ἔφεκτος, das Kapital u. der sechste Theil dazu, Dem. 34, 24; Harpocr. ὁ ἐπὶ τῷ ἕκτῳ τοῦ κεφαλαίου (162/3 Procent).