downfall
🇺🇸
/ˈdaʊnfɔːl/
🇬🇧
/ˈdaʊnfɔːl/
When someone loses their job, power, or social status, it's their downfall. It can also be the event that causes this loss.
His gambling habit was his downfall, as it led to financial ruin and the loss of his job.