You use ~ to describe something or someone that demands hard work and a great deal of care.
The Duke was not well enough to carry out such an ~ task...
ADJ: usu ADJ n
You use ~ to describe something or someone that demands hard work and a great deal of care.
The Duke was not well enough to carry out such an ~ task...
ADJ: usu ADJ n
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012