Where does “другар” come from?

другар (Serbo-Croatian) comes from Serbo-Croatian -а̄р, 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).

другар (Serbo-Croatian): comrade; friend

Definitions

comrade; friend

Ancestry of “другар”, step by step

Step	Language	Word	Meaning
1	Serbo-Croatian	-а̄р	—
2	Proto-Slavic	-ařь	-er
3	Gothic	-𐌰𐍂𐌴𐌹𐍃	-er
4	Proto-Germanic	-ārijaz	-er
5	Latin	-ārius	er
6	Proto-Italic	*-āzios	Forms relational adjectives to nouns (and rarely numerals)

Every word from Proto-Italic *-āzios →Every word from Latin -ārius →Every word from Proto-Germanic -ārijaz →