Which word if substitute for capacious in the second paragraph of dr. pascal, would best retain the meaning of the passage?

The word can be correctly replaced by another word called as scavenged.

Explanation:

This word basically means to remove or refuse. Abandoning the items from the useful materials can be referred to as scavenged. Here there is expulsion of the harmful substances and the elements form the scenario of the situation represented in the story. This is because there is lot of space in the room which is caused by removing the unnecessary elements from the room for or without a specific purpose.

"the sandy walls seemed to collapse in on themselves"

and

"the bloodshot waters seemed to have no bottom"

i believe the answer is perspective