This is the 245th most frequent Russian word.
республики
"Республики" means "republics" in English.
Here, 'республик' is used in the genitive plural to denote multiple autonomous regions or federal subjects linked to the central entity.
В составе страны есть несколько республик.
The country includes several republics.
In this context, 'республики' is in the genitive singular form to indicate ownership or association with this particular republic.
Они обсуждают развитие экономики этой республики.
They are discussing the economic development of this republic.
Here, 'республики' is in the accusative plural form, reflecting the direct object and indicating multiple republics in the Caucasus region.