rust

1. N-UNCOUNT Rust is a brown substance that forms on iron or steel, for example when it comes into contact with water. 鏽

...a decaying tractor, red with rust. …一輛腐朽的拖拉機，因生鏽而呈紅色。

2. V-I When a metal object rusts, it becomes covered in rust and often loses its strength. 生鏽

Copper nails are better than iron nails because the iron rusts. 銅釘比鉄釘好，因爲鉄釘會生鏽。

3. COLOR Rust is sometimes used to describe things that are reddish brown in colour. 鉄鏽色 (的)

...rust and gold leaves from the maples. …鉄鏽色和金黃色相間的楓葉。