What does Permessus mean in Latin?

Permessus, a proper noun, means “A river of Boeotia, whose springs were situated on the Helicon”.

What is the genitive of Permessus?

The genitive singular is Permessī. Permessus is masculine, second declension.

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

proper noun · masculinesecond declension

Permessus m sg (genitive Permessī)

Classical[pɛrˈmɛs.sʊs]Ecclesiastical[perˈmɛs.sus]

Permessus, i, m., = Περμησσός,

I. a river in Bœotia sacred to Apollo and the Muses, which rises in Mount Helicon and flows into the Copaic lake, Verg. E. 6, 64.— Hence,

A. Permessis, ĭdis or ĭdos, adj. f., Permessian, Mart. 1, 77, 11; 8, 70, 3.—

B. Permessĭus, a, um, adj., Permessian: fons, Claud. Laud. Seren. 8.

Borrowed from Ancient Greek Περμησσός (Permēssós).