χείμαῤῥος
From LSJ
ξένος ὢν ἀκολούθει τοῖς ἐπιχωρίοις νόμοις → as a foreigner, follow the laws of that country | when in Rome, do as the Romans do
German (Pape)
[Seite 1342] poet. statt χειμάῤῥοος; ποταμός Il. 4, 452. 5, 88; Pind. frg. 90; Lob. Phryn. 234. 669.
English (Strong)
from the base of χειμών and ῥέω; a storm-runlet, i.e. winter-torrent: brook.