ferrugineus

例句：

1. 1. Theold iron gate is covered in a thicklayer of rust.
   那把旧铁门上覆盖着厚厚的一层锈。
2. 2. The carwas rusty and needed to be painted.
   这辆车生锈了，需要重新喷漆。
3. 3.The old house had a rusty roofthat needed repairing.
   那所老房子的屋顶生锈了，需要修理。