Where does “рубњак” come from?

рубњак (Serbo-Croatian) comes from Serbo-Croatian ру̑б, from Proto-Slavic rǫbъ, from Proto-Slavic rǫbati — to cut, chop.

Definitions

Ancestry of “рубњак”, step by step

StepLanguageWordMeaning
1Serbo-Croatianру̑бrim
2Proto-Slavicrǫbъrim, edge
3Proto-Slavicrǫbatito cut, chop
Every word from Proto-Slavic rǫbati →Every word from Proto-Slavic rǫbъ →Every word from Serbo-Croatian ру̑б →