難解難分

难解难分
nánjiěnánfēn
  1. hard to untie, hard to separate (idiom); inextricably involved
  2. locked in battle

CEDICT

  1. (of a romantic couple) to be intimate and inseparable
  2. to be intimate and inseparable
  3. to be locked in a stalemate in a fight or struggle

Wiktionary

  1. 雙方爭鬥激烈，相持不下，難以分開。《西遊記．第二八回》：「他三個在半空中往往來來，戰經數十回合，不分勝負。各因性命要緊，其實難解難分。」也作「難分難解」。
  2. 形容情意極濃，難以分離。《紅樓夢．第五回》：「至次日便柔情繾綣，軟語溫存，與可卿難解難分。」也作「難分難解」、「難分難捨」、「難捨難分」。

重編國語辭典

Entry Composition

1 難解 nánjiě
  1. hard to solve
  2. hard to dispel
  3. hard to understand
  4. hard to undo
2 難 nán
  1. difficult (to...)
  2. problem
  3. difficulty
  4. difficult
  5. not good
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)