rust

vi.

1. 生锈
   Stainless steel does not rust.

   不锈钢不会生锈。

2. （脑子等）变迟钝；（能力等）荒废
   Don't let your mind rust during the vacation.

   不要让你的脑子在假期里变迟钝。

3. 成铁锈色
   The leaves slowly rusted in the fall.

   秋天叶子慢慢变成红褐色了。

vt.

1. 使生锈
   The rain will rust the iron roof.

   雨水将使铁皮屋顶生锈。

2. 使变迟钝；使（能力等）荒废
   A six-year lay-off has not rusted his skills.

   六年的待业并未使他的技术荒疏。

3. 【植】使患锈病
4. 使成锈色