Any metal that is resistant to corrosion or oxidation.

Roget 172: inertness, dullness etc. adj.; inertia, vis inertiae [Lat.], inertion^†, inactivity, torpor, languor; quiescence etc. 265; latency, inaction; passivity.    mental inertness; sloth etc. (inactivity) 683; inexcitability etc. 826^†; irresolution etc. 605; obstinacy etc. 606; permanence etc. 141.    rare gas, paraffin, noble metal, unreactivity.    ... show more

Polish: kruszec, metal szlachetny