If you do something ~, you do it without help from anyone or anything else.
There have been at least thirteen previous attempts to reach the North Pole ~...
ADJ: usu ADJ after v, also ADJ n
If you do something ~, you do it without help from anyone or anything else.
There have been at least thirteen previous attempts to reach the North Pole ~...
ADJ: usu ADJ after v, also ADJ n
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012