Aria (adjective of Ar), as in Viktel Aria, which translates as: 'The Triumph of Ar'

"I spoke to her, Master," I said. I called him 'Master' for he, like the young men who had caught me at the edge of the Viktel Aria, had made it clear to me that I was to address, whether I was free or not, with a slave's respect. 
Book 19, Kajira: pg 217