something that is mysterious and seems impossible to understand completely
发音
例句
1. I've known him for many years, but he remains something of an enigma to me. 我与他相识多年,他仍然难以捉摸。 2. Even after all the testimonies, the murder remained a enigma. 即使听完了所有的证词,这件谋杀案仍然是一个谜。