A problem that is ~ is so great that it cannot be dealt with successfully.
The crisis doesn’t seem like an ~ problem.
= insuperable
ADJ
A problem that is ~ is so great that it cannot be dealt with successfully.
The crisis doesn’t seem like an ~ problem.
= insuperable
ADJ
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012