To go back to a previous state or condition, often used in terms of moving backward in development or progress.

पूर्ववर्ती स्थिति में लौटना

English Usage: After a period of improvement, the patient seemed to regress in her recovery.

Hindi Usage: सुधार के बाद, मरीज की ठीक होने की प्रक्रिया पूर्ववर्ती स्थिति में लौटती हुई दिखी।