不谙世故 bù ān shì gù

DEFINITIONS

  1. unworldly
  2. unsophisticated

CHARACTERS

不 bù
HSK 1
no, not; un-; negative prefix
谙 ān versed in, fully acquainted with
世 shì
HSK 3
generation; world; era
故 gù
HSK 3
ancient, old; reason, because