dienvidslāvisks

Etymology
From.

Adjective

 * 1) south Slavic relating to the south Slavic peoples, their languages and territory
 * 2)  Yugoslavian relating to the former Yugoslavia

Usage notes
English “Yugoslavian” or “Southern Slavic” as an attributive adjective usually corresponds in Latvian to, the genitive plural form of. The adjective is commonly used as a predicate (“this is Yugoslavian”), or in its adverbial form.