Where does “gradina” come from?

gradina (Italian) comes from Serbo-Croatian -ār, from Proto-Slavic -ařь, from Gothic -𐌰𐍂𐌴𐌹𐍃, from Proto-Germanic -ārijaz, from Latin -ārius, from Proto-Italic *-āzios — Forms relational adjectives to nouns (and rarely numerals).

gradina (Italian): gradine; third-person singular present indicative...