Where does “Ruginoasa” come from?

Ruginoasa (Romanian) comes from Romanian ruginos, from Romanian rugină, from Latin aerūgina, from Latin aerūgō, from Latin aes, from Proto-Italic aos, from Proto-Italic ajos, from Proto-Indo-European h₂éyos — a metal, copper, bronze.

Ancestry of “Ruginoasa”, step by step

Step	Language	Word	Meaning
1	Romanian	ruginos	rusty, rusted, oxidated
2	Romanian	rugină	rust
3	Latin	aerūgina	—
4	Latin	aerūgō	rust of copper, verdigris
5	Latin	aes	money, pay, fee, fare; copper, bronze, brass;...
6	Proto-Italic	aos	bronze, copper
7	Proto-Italic	ajos	—
8	Proto-Indo-European	h₂éyos	a metal, copper, bronze

Words derived from “Ruginoasa”

Ruginoasa

Every word from Proto-Indo-European h₂éyos →Every word from Proto-Italic ajos →Every word from Proto-Italic aos →