conundrum
🇺🇸
/kəˈnʌndrəm/
🇬🇧
/kəˈnʌndrəm/
A puzzle or problem that is hard to understand or solve.
The mystery of the missing keys was a real conundrum for the detectives.
A riddle or joke that is meant to be funny or tricky.
The comedian's conundrum about why the chicken crossed the road got a big laugh from the audience.