腐

In a sentence

• 腐败的官员使人民失望。

  Corrupt officials disappoint the people.

  Here '腐' is part of '腐败', meaning 'corruption', indicating moral or structural decay.

• 这块肉已经腐烂了，不能吃了。

  This piece of meat has rotted and cannot be eaten.

  Here '腐' is part of '腐烂', meaning 'decomposition or rot', indicating the physical decay of organic matter.

• 我喜欢用豆腐做菜，因为它很健康。

  I like cooking with tofu because it's very healthy.

  Here '腐' is part of '豆腐', meaning 'tofu', a food product made from soybeans.