Where does “смяцярка” come from?

смяцярка (Belarusian) comes from Belarusian смяця́р, from Belarusian -ар, 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).

Ancestry of “смяцярка”, step by step

StepLanguageWordMeaning
1Belarusianсмяця́рgarbage collector
2Belarusian-арUsed to form animate nouns
3Proto-Slavic-ařь-er
4Gothic-𐌰𐍂𐌴𐌹𐍃-er
5Proto-Germanic-ārijaz-er
6Latin-āriuser
7Proto-Italic*-āziosForms relational adjectives to nouns (and rarely numerals)
Every word from Proto-Italic *-āzios →Every word from Latin -ārius →Every word from Proto-Germanic -ārijaz →