5.obstruct (vt.)
①阻擋、阻塞、遮斷(to block a road, an entrance, a passage, etc. so that sb/sth cannot get through, see past, etc.)
②(故意)妨礙、阻撓、阻礙(to prevent sb/sth from doing sth or making progress, especially when this is done deliberately)(=hinder)
本詩中選用意思①