The ability to make choices unconstrained by external factors.

Volition or the faculty of making one's own choices.

इच्छाशक्ति

English Usage: He acted upon his freewill to pursue a different career path.

Hindi Usage: उसने एक अलग करियर पथ को अपनाने के लिए अपनी इच्छाशक्ति के अनुसार कार्य किया।