Down'fall, n.
n. 1. A falling downward. “Those cataracts or downfalls aforesaid.” Holland.
Each downfall of a flood the mountains pour. Dryden.
Sense 2. A sudden descent from rank, reputation, happiness, or the like; loss of high station in any respect; destruction; ruin.
The city was in no condition to stand a siege, ... and dire were the consequences which would follow the downfall of so important a place. Motley.