The act of being dedicated or committed to one's responsibilities or obligations.

कर्तव्य के प्रति समर्पण

English Usage: His devotion to duty earned him great respect from his colleagues.

Hindi Usage: उनकी कर्तव्यनिष्ठा ने उन्हें उनके सहकर्मियों से बड़ा सम्मान दिलाया।