un ‧ con ‧ cern /ˌʌnkənˈsɜːn $ -ɜːrn/ BrE AmE noun [uncountable]
when you do not care about something that other people worry about
unconcern about/for/over
the government’s apparent unconcern about high inflation
un ‧ con ‧ cern /ˌʌnkənˈsɜːn $ -ɜːrn/ BrE AmE noun [uncountable]
when you do not care about something that other people worry about
unconcern about/for/over
the government’s apparent unconcern about high inflation
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012