Emotionless state or quality

Lack of emotional response

निर्विकारता

English Usage: His impassiveness during the crisis was astonishing.

Hindi Usage: संकट के दौरान उसकी निर्विकारता अद्भुत थी।

Calmness in difficult situations

शांतता

English Usage: Her impassiveness helped her navigate through the toughest negotiations.

Hindi Usage: उसकी शांतता ने उसे सबसे कठिन वार्ताओं के माध्यम से उत्तरदायी बना दिया।