palladium

palladium · noun¹

1. Ancient Greek · derived fromΠαλλάδιον
2. Latin · derived fromPalladium
3. English todaypalladium

The sense of "safeguard" comes from Latin Palladium (the image of Pallas that protected Troy), from Ancient Greek Παλλάδιον (Palládion), from Παλλάς (Pallás), an epithet used before Athena.

palladium · noun²

The element was named after Pallas, an asteroid that had been discovered two years before the element.