A return of something after a period of dormancy or inactivity.

पुनरुत्थान

English Usage: The recrudescence of the virus led to a new wave of infections.

Hindi Usage: वायरस का पुनरुत्थान नए संक्रमण की लहर का कारण बना।

To return to a state of activity after a period of inactivity.

पुनः सक्रिय होना

English Usage: After several years of calm, the conflict began to recrudesce.

Hindi Usage: कई वर्षों की शांति के बाद, संघर्ष ने पुनः सक्रिय होना शुरू कर दिया।