Enigma ***

enigma 







Yahoo!奇摩字典 



n. (名詞 noun)



          1.    謎;難以理解的事物





The Columbia Guide to Standard American English



enigma, mystery, puzzle, riddle (nn.)   

 

All these mean“something difficult to explain or resolve,”“something baffling.” 



Enigma began as a problem posed in language, a tale or riddle that was hard or impossible to fathom; 



then figuratively it came to be applied to anything difficult to explain or resolve, anything baffling, including a person who may be described as an enigma, a mystery, a puzzle, or a riddle.