This is the 489th most frequent Greek word.
θεσσαλίας
"Θεσσαλίας" means "of Thessaly," referring to the region of Thessaly in Greece.
Here, "Θεσσαλίας" is used in the nominative case to specify the name of a geographical region.
Η Θεσσαλίας είναι μια όμορφη περιφέρεια της Ελλάδας.
Thessaly is a beautiful region of Greece.
Here, "της Θεσσαλίας" is used in the genitive case to indicate possession, referring to the mountains belonging to Thessaly.
Επισκεφθήκαμε τα βουνά της Θεσσαλίας το καλοκαίρι.
We visited the mountains of Thessaly last summer.
Here, "της Θεσσαλίας" appears in a phrase denoting origin, utilizing the genitive case to refer to a city located within Thessaly.