Thank you all for help. I installed Cody, it's cool, it soon found what I need, it's very usful.
I checked the dictionary file, it has 147 KB, and will not take up too much space, but I have a question, can I turn off Cody's auto save function? Because I basically won't change Lazarus's unit files, I want the dictionary file to be static and only read when I need it. I don't want my disk to be written data repeatedly, which will reduce the life of my disk.