C1 adjective /ˈnɒnʃələnt/
nonchalant
উদাসীন
Meaning
Appearing calm, casual, and unconcerned.
Example
He gave a nonchalant shrug and walked away.
সে উদাসীনভাবে কাঁধ ঝাঁকিয়ে চলে গেল।