@d_t_j_p @mattvsjapan To dumb down means to make something simpler in a patronising kind of way. You can usually find good definitions for phrases like this on wiktionary https://t.co/393fSckCTT
(also this is unrelated but I think 'smth' is more common and intuitive than 'sth')
@HiguchiEnglish On my cards the sentences are pretty small, so I have to strain a bit to read them. That way I can stop myself from reading the sentence until after seeing the word on its own and seeing if I know it automatically. Maybe you could try that?