rust
n//ɹʌst//rost, rostbrun, rostfärgad, rosta
The deteriorated state of iron or steel as a result of moisture and oxidation; it consists mostly of iron(III) oxide (ferric oxide) and iron(II) oxide (ferrous oxide).
A disease of plants caused by a reddish-brown fungus.
A reddish-brown color.
(transitive) To cause to oxidize.