习以成俗
xí​yǐ​chéng​sú

to become accustomed

  1. 习 習 xí verb
    to become accustomed to
    (bound form) to become accustomed to; to be familiar with; to adapt to something through repeated exposure
  2. 以 yǐ prepositionconjunction
    in order to
    in order to; so as to; used to connect two phrases where the second is the purpose of the first
  3. 成俗 chéng​sú
    to become a custom
    To become a social custom; to develop into a tradition over time.