Not discouraged or disheartened; showing bravery in the face of adversity.

निश्चिंत, न निराश

English Usage: She remained undismayed by the criticism she received for her project.

Hindi Usage: उसने अपने प्रोजेक्ट के लिए मिली आलोचना से निश्चिंत रहकर काम किया।