rust >> rʌst
Definition: [noun] a reddish- or yellowish-brown flaking coating of iron oxide that is formed on iron or steel by oxidation, especially in the presence of moisture.
Example: paint protects your car from rust
Definition: [noun] a fungal disease of plants which results in reddish or brownish patches.
Definition: [noun] a reddish-brown colour.
Example: her rust-coloured coat
Definition: [verb] be affected with rust.
Example: the blades had rusted away