A great way to remember a character is by searching for patterns across all the words that contain it. Can you find similarities?
|到底||4||dào dǐ||on earth (for emphasis), at last|
|底||4||dǐ||bottom, end of month/year|
|贯彻||6||guàn chè||carry out, implement, put into operation|
|归根到底||6||guī gēn dào dǐ||in the final analysis, in essence|