Ἀχαιός
From LSJ
Ἡ μωρία δίδωσιν ἀνθρώποις κακά → Inepta mens hominibus impertit mala → Die Torheit gibt den Menschen Unglück zum Geschenk
English (LSJ)
ά, όν,
A Achaean, Hom., etc.: hence as Subst., 1 Ἀχαιοί, οἱ, the Achaeans, in Hom. for the Greeks generally, Il.2.235, etc. 2 Ἀχαΐα, ἡ, Achaia in Peloponnese, Th., etc.; under the Romans, the prouince of Greece.