vt.

1. 防止，预防
   Vitamin C is supposed to prevent colds.

   维生素C被认为能预防感冒。

2. 阻止；制止；妨碍[（+from）]
   Who prevents their plans from being carried out?

   谁阻止他们的计划不让实施？

   Of course I can't prevent your going.

   当然，我不能阻止你去。

3. 【古】先做；先去；先来

vi.

1. 妨碍；阻止

v.

1. keep from happening or arising.
   ▸make unable to do something.
2. archaic (of God) go before (someone) with spiritual guidance and help.