n.

1. 事业；企业；工作[C][S1]
   It seemed an endless undertaking.

   那件事办起来像没个完似的。

   charitable undertakings

   慈善事业

2. 保证；许诺[C][+to-v][+that]
   give an undertaking not to take sides

   保证不偏袒任何一方

3. 丧葬事宜；殡仪业[U]

n.

1. a formal pledge or promise.
2. a task that is taken on.
3. a company or business.
4. the business of managing funerals.