1The ancient statue began to crumble as soon as it was exposed to the elements.
2After the loss of her loved one, her mental state started to crumble, and she required professional help.
3The company's financial foundation began to crumble when several major investors withdrew their support.
4The once-stable government started to crumble as the opposition party gained momentum and public trust.
5As the deadline loomed closer, her confidence started to crumble, and she struggled to complete the project.