unconcern
un|con|cern /'ʌnkəns'ɜːrn/
[N-UNCOUNT]
A person's unconcern is their lack of interest in or anxiety about something, often something that most people would be concerned about.
She'd mentioned it casually once, surprising him by her unconcern...
≠ concern
[N-UNCOUNT]
A person's unconcern is their lack of interest in or anxiety about something, often something that most people would be concerned about.
She'd mentioned it casually once, surprising him by her unconcern...
≠ concern