יַרְדֵּן

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)

Source

English (Strong)

from יָרַד; a descender; Jarden, the principal river of Palestine: Jordan.