Definition of enigmatic adjective from the Oxford Advanced Learner's Dictionary

 

enigmatic

 adjective
adjective
BrE BrE//ˌenɪɡˈmætɪk//
 
; NAmE NAmE//ˌenɪɡˈmætɪk//
 
 
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mysterious and difficult to understand an enigmatic smile Word Origin early 17th cent.: from French énigmatique or late Latin aenigmaticus, based on Greek ainigma ‘riddle’, from ainissesthai ‘speak allusively’, from ainos ‘fable’.
See the Oxford Advanced American Dictionary entry: enigmatic