a.

1. 阻礙的；堵塞的
   His interference is very obstructive toward our progress.

   他的干預對我們的進步造成了相當的阻礙。

n.

1. 障礙物
2. 妨礙者

adj.

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