LATIN DICTIONARYLexicon Latīnum
proper noun · masculinesecond declension

Fosī

Fosī m pl (genitive Fosōrum)
Classical[ˈfɔ.siː]Ecclesiastical[ˈfɔː.s̬i]

Meaning

  1. A tribe of Germania mentioned by Tacitus

Declension

declension
formsingularplural
nominative—Fosī
genitive—Fosōrum
dative—Fosīs
accusative—Fosōs
ablative—Fosīs
vocative—Fosī

Fosi, ōrum, m.,
I. a Germanic tribe, a branch of the Cheruscans, near the modern Celle, Tac. G. 36.

In the Academy Smith's classical dictionaries

GeographyFosiEth. Fosi a small German tribe, of which nothing is known beyond what Tacitus (Germ. 36) relates of them, viz., that they were subject to the Cherusci…

Quick answers

What does Fosī mean in Latin?
Fosī, a proper noun, means “A tribe of Germania mentioned by Tacitus”.
What is the genitive of Fosī?
The genitive singular is Fosōrum. Fosī is masculine, second declension.
How do you pronounce Fosī?
In classical Latin, [ˈfɔ.siː]; in ecclesiastical (church) Latin, [ˈfɔː.s̬i].