a.

1. 阻碍的；堵塞的
   His interference is very obstructive toward our progress.

   他的干预对我们的进步造成了相当的阻碍。

n.

1. 障碍物
2. 妨碍者

adj.

1. causing an obstruction.
2. causing deliberate difficulties and delays:
   a culture of obstructive bureaucracy.