"lack of imagination is an obstacle to one's advancement"
"the poverty of a district is an obstacle to good education"
"the filibuster was a major obstruction to the success of their plan"
"obstruction of justice"
This does make some obstruction in the blood, this cross-gartering.
出自：Twelfth Night , Shakespeare
In every field Democratic proposals..are met by Republican indifference, obstruction and opposition.
出自： A. E. Stevenson
All they can be arrested for is causing an obstruction.