/kǔpus/
PodrijetloBorrowed from German Kappus (“cabbage”), with the first -u- coming by merger with another word with the same meaning. Compare dialectal Serbo-Croatian kapuc, kapus (from Venetan capuzzo), and also Old Serbo-Croatian (Kajkavian) kupust (ultimately from Latin composita (“mixed”). First attested in the 16th century.
Oblicikùpus(canonical, inanimate, masculine) · ку̀пус(Cyrillic) · kupus(nominative, singular) · kupusa(genitive, singular) · kupusu(dative, singular) · kupus(accusative, singular) · kupuse(singular, vocative) · kupusu(locative, singular) · kupusom(instrumental, singular)
Izvor: Wiktionary