εὐκολία
From LSJ
τὸ ἐγδοχῖον τοῦ ὕδατος καὶ τὰ ἐν τῆι πόλει ὑδραγώγια → the water reservoir and the conduits in the city (or on the acropolis)
English (LSJ)
ἡ, (εὔκολος) prop.
A contentedness with one's food, Plu.2.461c; ἡ περὶ τὴν δίαιταν εὐ. Id.Caes. 17: but, in earlier authors, 2 of the mind, contentedness, good temper, Pl.Alc.1.122c, etc.; ὀλιγόδεια καὶ εὐ. Ph.2.457. 3 of the body, ease and lightness in moving, εὐ. καὶ εὐχέρεια Pl.Lg.942d: metaph., εὐ. πρὸς τὴν ποίησιν facility in verse-making, Plu.Cic.40; εὐ. πρήξιος AP7.694 (Adaeus).