LATIN DICTIONARYLexicon Latīnum
proper noun · neutersecond declension

Sūnium

Sūnium n sg (genitive Sūniī or Sūnī)
Classical[ˈsuː.ni.ũː]Ecclesiastical[ˈsuː.ni.um]

Meaning

  1. A promontory and town situated on the southern coast of Attica

Declension

declension
formsingularplural
nominativeSūnium—
genitiveSūniī
Sūnī
—
dativeSūniō—
accusativeSūnium—
ablativeSūniō—
vocativeSūnium—
locativeSūniī—

Sūnĭum or Sūnĭon, ii, n., = Σούνιον,
I. a promontory and town of Attica, now Capo Colonna, Mel. 2, 2, 8; 2, 3, 6; Cic. Att. 13, 10, 3; 7, 3, 10; Plin. 4, 7, 11, § 24; Ter. Phorm. 5, 5, 9; id. Eun. 3, 3, 13; Liv. 28, 8; 31, 22; 32, 17.—Form Sunion, Ov. F. 4, 563; Stat. Th. 12, 625.

Origins

Borrowed from Ancient Greek Σούνιον (Soúnion).

In the Academy Smith's classical dictionaries

Quick answers

What does Sūnium mean in Latin?
Sūnium, a proper noun, means “A promontory and town situated on the southern coast of Attica”.
What is the genitive of Sūnium?
The genitive singular is Sūniī. Sūnium is neuter, second declension.
How do you pronounce Sūnium?
In classical Latin, [ˈsuː.ni.ũː]; in ecclesiastical (church) Latin, [ˈsuː.ni.um].