›behaving in a calm manner, often in a way that suggests you are not interested or do not care: a nonchalant manner/shrugLacking interest and enthusiasmUnwilling and reluctantNot showing or feeling emotionsnonchalance
/ˈnɒn.ʃəl.əns//ˌnɑːn.ʃəˈlɑːns/noun[U]Lacking interest and enthusiasmUnwilling and reluctantNot showing or feeling emotionsnonchalantly
/-li/adverbLacking interest and enthusiasmUnwilling and reluctantNot showing or feeling emotions