OBSTRUCT is the opposite of

Question

Quizplus · Accepted Answer

The opposite of obstruct would be clear:
Obstruct: to block or get in the way of
A fallen tree was obstructing the path.
Clear: free from obstructions
The workers cleared the road of debris after the tree fell down. 
The meanings of the remaining answer choices are similar to the meaning of the word 'obstruct':
Occlude: to block
The patient's arm turned purple because of an occluded artery.
Barricade: a barrier that blocks people or vehicles from getting through
Before they begin working, construction workers will barricade the street to stop traffic.
Curb: to restrain or to keep in check
It is hard to curb my strong cravings for chocolate.
Impede: to interfere with or to get in the way of 
Do not do anything to impede our investigation of this matter.

OBSTRUCT Is the Opposite of