这个词不太常见，正确的说法是“辛辛苦苦”，意思是做事情很累、很不容易。

This word is not very common; the correct form is "辛辛苦苦", meaning to do something with great effort and difficulty.

我们常常用它来说一个人工作或者学习花了很多力气。

We often use it to say that someone has put a lot of effort into working or studying.