jezika
Jezika is the genitive singular form of the noun jezik in Croatian, Serbian, and Bosnian. In these languages, jezik means tongue or language, and jezika is used in constructions that express possession, specification, or relation to a language. For example, znanje jezika means “knowledge of a language,” and more languages can be expressed with phrases like više jezika, indicating quantity or comparison.
Etymology and cognates: The word jezik derives from Proto-Slavic *językъ and has cognates across the Slavic language
Usage and grammatical notes: Jezika appears primarily in formal and standard contexts where the genitive case