Where does “hvezdáreň” come from?

hvezdáreň (Slovak) comes from Slovak hvezdár, from Slovak -ár, 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).

hvezdáreň (Slovak): observatory building used to observe celestial bodies

Definitions

observatory building used to observe celestial bodies

Ancestry of “hvezdáreň”, step by step

Step	Language	Word	Meaning
1	Slovak	hvezdár	astronomer
2	Slovak	-ár	From verbs forms agent nouns
3	Proto-Slavic	-ařь	-er
4	Gothic	-𐌰𐍂𐌴𐌹𐍃	-er
5	Proto-Germanic	-ārijaz	-er
6	Latin	-ārius	er
7	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 →