If you describe a task as ~, you dislike having to do it because you find it difficult or unpleasant. (FORMAL)
...parents who have had the ~ task of bringing up a very difficult child.
ADJ
If you describe a task as ~, you dislike having to do it because you find it difficult or unpleasant. (FORMAL)
...parents who have had the ~ task of bringing up a very difficult child.
ADJ
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012