puzzler

The final question on the quiz was a real puzzler that took me ten minutes to solve.

测验的最后一题真是个难题，我花了十分钟才解出来。

用法提示：此处puzzler作可数名词，指令人困惑的难题。

After hours of discussion, the team still couldn't crack the puzzler in the escape room.

经过几个小时的讨论，团队仍然无法解开密室逃脱里的那个难题。

用法提示：puzzler指需要解决的疑难问题，可数名词。

The crossword editor always includes at least one tricky puzzler to challenge regular readers.

填字游戏编辑总会加入至少一个棘手的难题来挑战老读者。

用法提示：puzzler用作单数可数名词，意为令人困惑的谜题。