习以为常
xí​yǐ​wéi​cháng

accustomed to

  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. 以为 以為 yǐ​wéi adjectiveverb
    to use as; to regard as
    (literary) To use as, take as, or regard as; frequently appears in the structure 以 yǐ A 为 wéi B (to take A as B)
  3. 常 cháng adverbadjective
    ordinary
    (bound form) ordinary; common; normal; general