LATIN DICTIONARYLexicon Latīnum
noun · neutersecond declension

archīum

archīum n (genitive archīī)
Classical[arˈkʰiː.ũː]Ecclesiastical[arˈkiː.um]

Meaning

  1. the archives

Declension

declension
formsingularplural
nominativearchīumarchīa
genitivearchīīarchīōrum
dativearchīōarchīīs
accusativearchīumarchīa
ablativearchīōarchīīs
vocativearchīumarchīa

archīum or archīvum, i, n., = ἀρχεῖον,
I. the archives (post-class.), Dig. 48, 19, 9, § 6; Mel. 3, 8 fin.: antiquissimarum gentium archiva, Tert. Apol. 19; so id. adv. Marc. 4, 7.

Quick answers

What does archīum mean in Latin?
archīum, a noun, means “the archives”.
What is the genitive of archīum?
The genitive singular is archīī. archīum is neuter, second declension.
How do you pronounce archīum?
In classical Latin, [arˈkʰiː.ũː]; in ecclesiastical (church) Latin, [arˈkiː.um].