A ~ problem or question is very difficult and causes people a lot of trouble.
Ministers have begun work on the ~ issue of economic union...
Later Mr Moi raised the ~ question of refugees.
= thorny
ADJ: usu ADJ n
see also vex
A ~ problem or question is very difficult and causes people a lot of trouble.
Ministers have begun work on the ~ issue of economic union...
Later Mr Moi raised the ~ question of refugees.
= thorny
ADJ: usu ADJ n
see also vex
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012