LATIN DICTIONARYLexicon Latīnum
proper noun · femininethird declension

Achāis

Achāis f sg (genitive Achāidis or Achāidos)
Classical[aˈkʰaː.ɪs]Ecclesiastical[aˈkaː.is]

Meaning

  1. Achaea, a province in the northern part of Peloponnesus

Declension

declension
formsingularplural
nominativeAchāis—
genitiveAchāidis
Achāidos		—
dativeAchāidī—
accusativeAchāida—
ablativeAchāide—
vocativeAchāis
Achāi		—

Charlton Lewis's shorter dictionary for students: the same scholarship in plain, modern definitions.

Achāis idis or idos, adj.,
f Grecian: urbes, O.—As subst. for Achaia, Greece, O.

Origins

From the Ancient Greek Ἀχαία (Akhaía).

Quick answers

What does Achāis mean in Latin?
Achāis, a proper noun, means “Achaea, a province in the northern part of Peloponnesus”.
What is the genitive of Achāis?
The genitive singular is Achāidis. Achāis is feminine, third declension.
How do you pronounce Achāis?
In classical Latin, [aˈkʰaː.ɪs]; in ecclesiastical (church) Latin, [aˈkaː.is].