难 英语怎么说

难在英语中可以用difficult来表示。difficult来源于拉丁语difficilis，意思是"困难的"。
例句：
This math problem is very difficult. 这道数学题很难。
It was a difficult decision, but I think I made the right choice. 这是一个困难的决定，但我想我做出了正确的选择。