Where does “rabac” come from?

rabac (Serbo-Croatian) comes from Proto-Slavic vorbьcь, from Proto-Slavic -ьcь, from Lithuanian -ikas, from Proto-Indo-European -iḱos — -y, -ic.

Ancestry of “rabac”, step by step

StepLanguageWordMeaning
1Proto-SlavicvorbьcьAlternative form of *vorbь
2Proto-Slavic-ьcьForms diminutives from nouns; Forms nouns from...
3Lithuanian-ikas—
4Proto-Indo-European-iḱos-y, -ic
Every word from Proto-Indo-European -iḱos →Every word from Proto-Slavic -ьcь →Every word from Lithuanian -ikas →