What does Ambrȳsus mean in Latin?

Ambrȳsus, a proper noun, means “a town of Phocis, situated on a fertile valley near Stiris”.

What is the genitive of Ambrȳsus?

The genitive singular is Ambrȳsī. Ambrȳsus is feminine, second declension.

In classical Latin, [amˈbryː.sʊs]; in ecclesiastical (church) Latin, [amˈbriː.s̬us].

proper noun · femininesecond declension

Ambrȳsus f sg (genitive Ambrȳsī)

Classical[amˈbryː.sʊs]Ecclesiastical[amˈbriː.s̬us]

Ambrȳsus or Ambryssos, i, f., = Ἄμβρυσος or Ἄμβρυσσος,

I. a small town in Phocis, now Dhistomo, Liv. 32, 18; Plin. 4, 3, 4, § 8.

Borrowed from Ancient Greek Ἄμβρυσος (Ámbrusos).