done in secret or confidentiality

privately, without public knowledge

निजी तौर पर, सार्वजनिक ज्ञान के बिना

English Usage: The negotiations were conducted sub rosa to maintain a competitive advantage.

Hindi Usage: सहमति निजी तौर पर रखी गई ताकि प्रतिस्पर्धात्मक लाभ बनाए रखा जा सके।