catch on
phrasal verb with catch verb uk/kætʃ/ us/kætʃ/ caught | caught
(BECOME POPULAR)
C1 变得流行；变得受欢迎
to become fashionable or popular
I wonder if the game will ever catch on with young people? 我想知道这个游戏会不会在年轻人当中流行开来？
(UNDERSTAND)
C2 informal（尤指很久以后才）理解，领会
to understand, especially after a long time
He doesn't take hints very easily, but he'll catch on (to what you're saying) eventually. 他不太会察言观色，不过最终还是会明白（你所说的话）的。