LATIN DICTIONARYLexicon Latīnum
suffix

-ās

-ās
Classical[ˈaːs]Ecclesiastical[ˈas]

Meaning

  1. morphemeUsed to form gentilic adjectives with the meaning "of/from" a country or place.

Origins

Latin -as By syncope, from the earlier form -ātis. If Oscan 𐌋𐌞𐌅𐌊𐌀𐌍𐌀𐌕𐌄𐌝𐌔 (lúvkanateís, “Lucanian”, gen. sg.) has a cognate suffix -𐌀𐌕𐌄𐌝𐌔 (-ateís), one can reconstruct Proto-Italic *-ātis.

Quick answers

What does -ās mean in Latin?
-ās, a suffix, means “Used to form gentilic adjectives with the meaning "of/from" a country or place.”.
How do you pronounce -ās?
In classical Latin, [ˈaːs]; in ecclesiastical (church) Latin, [ˈas].