Ärgh, It is pronounced like https://www.youtube.com/watch?v=SIaFtAKnqBU, more or less., top.
The only watercourse that can be considered a river in southern Anthologica. It serves as a natural border between Downunder and the Cracked Marches.
etymology: An example of old Syndyktean hydronymy. From a prehistoric root meaning "water" in the old Yellingoats language. According to Hadreizhen (2016) the reconstruction would be ˈarɣə → aˈrəwə → aˈʁwə → əˈʕʷə.