difficult的名词形式是difficulty.
difficulty：n.困难;难题;难事;困境;艰难;费劲;辛苦;困难程度;难度。
扩展资料
The government had to bail the company out of financial difficulty.
政府只得帮助该公司渡过财政难关。
He found the place without difficulty.
他毫不费力地找到了那地方。
The changes were made with surprisingly little difficulty.
这些变化几乎没有遇到阻力，简直不可思议。
We found the house without difficulty.
我们轻而易举就找到了这栋房子。
The tasks have been ranked in order of difficulty.
按照困难程度对工作进行了分类。
