“悔”的意思是做错了事以后觉得难过，很想改变，可是已经太晚了。

The meaning of "悔" is feeling sad after making a mistake and wanting to change, but it's already too late.

这个字常常和别的字一起用，比如“后悔”和“悔改”。

This character is often used with other characters, such as in "后悔" and "悔改".