A great way to remember a character is by searching for patterns across all the words that contain it. Can you find similarities?
|才||3||cái||only, only then|
|刚||4||gāng||exactly, just, just now|
|人才||5||rén cái||talent, person with ability|
|才干||6||cái gàn||ability, competence|
|天才||6||tiān cái||genius, prodigy|