An ~ attempt to do something does not succeed.
Efforts to reach the people named in the report proved ~...
He died after a brave but ~ fight against a terminal illness.
= unsuccessful
ADJ
An ~ attempt to do something does not succeed.
Efforts to reach the people named in the report proved ~...
He died after a brave but ~ fight against a terminal illness.
= unsuccessful
ADJ
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012