v .
a puzzle or problem without a solution 수수께끼 ; 답이 없는 문제

• What to do about the dirty dishes piling up in the sink was a conundrum that the four roommates could not even begin to solve.
  싱크대에 잔뜩 쌓여있는 더러운 접시들을 어떻게 할 것인가 하는 문제는 네 명의 룸메이트가 해결할 시도조차 해볼 수 없는 난제였다.
• English grammar was a conundrum to Marcia ; she just couldn't figure out how to put two words together.