Lewis & Short

Ărūpĭum, ii, n., = Ἀρούπεινον, Strabo, a town in Illyria, now Auersperg, Itin. Anton.
Hence, Ărūpīnus, a, um, of or pertaining to Arupium: Arupinis natus in arvis, Tib. 4, 1, 110.