puzzler
🇺🇸
/ˈpʌzlər/
🇬🇧
/ˈpʌzlə(r)/
A question or problem that is difficult to solve or understand.
The new math problem was quite a puzzler for the students.
새로운 수학 문제가 학생들에게 꽤 어려운 문제였습니다.