Where does “grubijan” come from?
grubijan (Serbo-Croatian) comes from Serbo-Croatian grȗb, from Proto-Slavic grǫbъ, from Proto-Slavic grěti, from Proto-Indo-European gʷʰer-, from Proto-Indo-European gʷʰe-gʷʰór-e ~ gʷʰe-gʷʰr-ḗr.
grubijan (Serbo-Croatian): boor, ruffian
Ancestry of “grubijan”, step by step