I said two words that made her unhappy yesterday. I apologized to her at that time, and she didn't accept it. Later, I sent WeChat, and what did he mean by replying?

Only by caring about a person can you have a good feeling or dislike for his words or actions. So, in her heart, she still cares about you. But maybe you said something that she really couldn't accept, so she was really angry. But after calming down, she may feel that she shouldn't treat you with this attitude, because it will make you unhappy. So, just have this conversation. Both friends and lovers should cherish and take care of each other. True love is to wish each other happiness! Good luck!