The reddish matter formed on iron and steel through exposure to dampness; red oxide of iron.

铁锈；红色氧化铁。

A similar formation from corrosion on other metals.

(他种金属之)锈。

Anything like rust; mildew on wheat, corn, etc.

如锈之物；【植】(麦谷等之)霉菌；锈斑病。

Reddish brown.

红褐色。

To form rust.

生锈。

To grow worthless because of idleness.

荒废。

To cause to contract rust.

使生锈。

To impair by time or inaction.

使荒废；使腐朽。