N-COUNT [usually singular]難解之謎;費解的事;費解的人 If you describe something or someone as an enigma, you mean they are mysterious or difficult to understand. 難解之謎;費解的事;費解的人
Iran remains an enigma for the outside world.
對於外界而言,伊朗仍是個謎。
...a story which makes clear the modern enigma of spirituality.