What does Apsus mean in Latin?

Apsus, a proper noun, means “A river of Illyria that flows into the sea beatween the rivers Genusus and Aous, now the river Seman in Albania”.

What is the genitive of Apsus?

The genitive singular is Apsī. Apsus is masculine, second declension.

In classical Latin, [ˈap.sʊs]; in ecclesiastical (church) Latin, [ˈap.sus].

proper noun · masculinesecond declension

Apsus m sg (genitive Apsī)

Classical[ˈap.sʊs]Ecclesiastical[ˈap.sus]

masculinesingularA river of Illyria that flows into the sea beatween the rivers Genusus and Aous, now the river Seman in Albania

Apsus, i, m., = Ἄψος,

I. a river of Illyria, falling into the Ionian Sea, now Crevata, Caes. B. C. 3, 13; 3, 19; Liv. 31, 27.

From Ancient Greek Ἄψος (Ápsos).