sink into deep depression
The German phrase 'in eine tiefe Depression versinken' is a direct translation of 'sink into deep depression'. It is used to describe a state of severe and prolonged sadness or despair. The verb 'versinken' means 'to sink', and the noun 'Depression' refers to a state of depression. The adjective 'tief' means 'deep', indicating the severity of the depression.
He began to sink into a deep depression after the death of his wife.
This sentence suggests that the person has started to feel extremely sad and hopeless, characteristic of a deep depressive state, following the death of his wife.
Without a job, she quickly found herself sinking into a deep depression.
In this context, the person became extremely depressed as a result of losing her job.
The news of his dismissal made him sink into a deep depression.
This sentence is illustrating how the information that he had been fired from his job led him into a serious depression.