τὸ ἐγδοχῖον τοῦ ὕδατος καὶ τὰ ἐν τῆι πόλει ὑδραγώγια → the water reservoir and the conduits in the city (or on the acropolis)
ἀγρίδιον, λάξις, γήπεδον, γεώπεδον, γεωπέδιον