密不可分

mìbùkěfēn
  1. inextricably linked (idiom)
  2. inseparable

CEDICT

Entry Composition

1 密 mì
  1. dense; close; thick
  2. intimate; close
  3. (bound form) secret; confidential
  4. (Internet slang) to send a private message to (sb); to DM
2 不可 bùkě cannot; should not; must not
3 分 fēn
  1. to divide; to separate
  2. to distribute; to allocate
  3. to distinguish (good and bad)
  4. (bound form) branch of (an organization); sub- (as in 分局 fēnjú)
  5. fraction
  6. one tenth (of certain units)
  7. unit of length equivalent to 0.33 cm
  8. minute (unit of time)
  9. minute (angular measurement unit)
  10. a point (in sports or games)
  11. 0.01 yuan (unit of money)