This is the 285th most frequent Lithuanian word.
lietuvių
"Lietuvių" means "Lithuanians" or "Lithuanian" (related to the language or people).
In this sentence, 'lietuvių' refers to the adjective form describing the Lithuanian language.
Mokausi lietuvių kalbos.
I am learning the Lithuanian language.
In this context, 'lietuvių' is used as a descriptive adjective qualifying songs associated with Lithuanians.
Lietuvių dainos yra labai gražios.
Lithuanian songs are very beautiful.
Here, 'lietuvių' is used as an attributive adjective describing the culture of Lithuanians.