διπλασιεπιδίτριτος
From LSJ
πολλὰ μεταξὺ πέλει κύλικος καὶ χείλεος ἄκρου → there is many a slip twixt cup and lip, there's many a slip twixt cup and lip, there's many a slip 'twixt cup and lip, there's many a slip twixt the cup and the lip, there's many a slip 'twixt the cup and the lip
English (LSJ)
διπλασιεπιδίτριτον, ibid., Domnin. in Rev.Phil.7.90, 2⅔ times as great.
Spanish (DGE)
-ον
de proporción 2⅔ Nicom.Ar.1.23, Domn.Prop.12, 16.
German (Pape)
2⅔mal so groß, Nicom. inst.arithm. 1.23.