To persist or remain involved until something is completely finished or concluded, often despite difficulties or challenges.

अंत तक डटे रहना

English Usage: She was determined to fight until the bitter end to achieve her goals.

Hindi Usage: वह अपने लक्ष्यों को प्राप्त करने के लिए अंत तक लड़ने के लिए दृढ़ संकल्पित थी।