a.

1. 可（或易）接近的；可（或易）进入的
   a town accessible by rail

   有铁路通达的城镇

2. 可（或易）得到的；可（或易）使用的[（+to）]
   Medicine should not be kept where it is accessible to children.

   药品不应放在儿童容易拿到的地方。

3. 易受影响的，易感受的[（+to）]
   He is not accessible to pity.

   他不大有同情心。

4. 易被理解的；受到赞赏的
   Those are his most accessible stories.

   那些是他最受欢迎的短篇小说。

adj.

1. able to be accessed.
2. friendly and easy to talk to; approachable.
3. easily understood or appreciated.