breakdown (n)

The breakdown of communication within the team led to misunderstandings and delays in the project.
The emotional breakdown she experienced after a series of personal challenges was a turning point in her life, prompting her to seek help and make positive changes.
The breakdown of the relationship between the two countries resulted in strained diplomatic ties and trade restrictions.
She suffered a nervous breakdown due to the stress and workload, leading to a temporary leave from work for her recovery.