Where does “ostaro” come from?
ostaro (Esperanto) comes from Esperanto -aro, from Russian -а́рь, from Proto-Slavic -ařь, from Gothic -𐌰𐍂𐌴𐌹𐍃, from Proto-Germanic -ārijaz, from Latin -ārius, from Proto-Italic *-āzios.
ostaro (Esperanto): skeleton
Ancestry of “ostaro”, step by step