Where does “Srpska” come from?

Srpska (Serbo-Croatian) comes from Serbo-Croatian Sȑbin, from Proto-Slavic sьrbъ, from Proto-Indo-European sēr-, from Proto-Indo-European ser- — to flow; to guard; to bind, to tie together.

Ancestry of “Srpska”, step by step

StepLanguageWordMeaning
1Serbo-CroatianSȑbinSerb
2Proto-Slavicsьrbъally
3Proto-Indo-Europeansēr-to flow
4Proto-Indo-Europeanser-to flow; to guard; to bind, to tie together
Every word from Proto-Indo-European ser- →Every word from Proto-Indo-European sēr- →Every word from Proto-Slavic sьrbъ →