ῥυάκιον
From LSJ
Παρθένε, ἐν ἀκροπόλει Τελεσῖνος ἄγαλμ' ἀνέθηκεν, Κήττιος, ᾧ χαίρουσα, διδοίης ἄλλο ἀναθεῖναι → O Virgin goddess, Telesinos from the deme of Kettos has set up a statue on the Acropolis. If you are pleased with it, please grant that he set up another
Greek (Liddell-Scott)
ῥυάκιον: τό, ὑποκορ. τοῦ ῥύαξ, Εὐαγγ. Θωμᾶ σ. 280, 7.