obstructs

obstruct, bar, block, dam, hinder, impede

这组词共同的意思是“阻挡”。它们的区别是：
1.block指有效地堵住了所有通道,使人、物等无法通过; bar指堵住出入口; dam指挡住涌流物,如眼泪等; obstruct和impede都指在路上设障碍以使运动的物体或事物速度放慢或阻挡其前进, impede比obstruct语气更强些,指困难非常大; hinder则强调阻碍和干扰的有害或令人讨厌。例如:
Heavy traffic blocked the road.拥挤的车辆阻塞了道路。
She barred him out of her room.她把他关在她的房间外面。
She barred up her tears.她抑制住了自己的眼泪。
Tall trees obstructed his moving.大树阻挡了他的前进。
The development of the project was seriously impeded by a reduction in funds.由于基金削减,工程进度严重受阻。
2.bar有时没有阻碍的含义,只指“禁止”。例如:
My father barred smoking at the dinner-table.我父亲禁止在餐桌上用餐时吸烟。