arduous [ˈɑ:djuəs]

以下由轻松背单词网站提供

adj.艰苦的，费力的，陡峭的

difficult , needing a lot of effort and energy

We must have patience in doing arduous work. 我们做艰苦的工作要有耐性。
The task was more arduous than he had calculated. 这项任务比他所估计的要艰巨得多。