From Longman Dictionary of Contemporary Englishenigmaticen‧ig‧mat‧ic /ˌenɪɡˈmætɪk◂/ adjective MYSTERIOUSmysterious and difficult to understandenigmatic smile/expression etc —enigmatically /-kli/ adverb ‘You’ll see, ’ he replied enigmatically.
Examples from the Corpus
enigmatic• He was fascinated by the enigmatic actress.• Freud remains today an enigmatic figure.• Still, he is impressive as the surly, enigmatic intellectual who offers Jane a glimmer of hope for a better life.• The books they marked were returned, probably not fully read, but with these enigmatic new chapters unwittingly added.• Some years before, I might have guessed Bond's enigmatic presence in the scene.• She presented him with barrier after barrier of enigmatic remarks, as now.• Ever since the start of the journey Ahamado had remained enigmatic, silent and unforthcoming.• She smiled that enigmatic smile again as I countered with my bishop's pawn.• His face wore that same enigmatic smile, but he did not speak.• Rafiq did not speak but stood looking at his two colleagues, an enigmatic smile on his face.• an enigmatic smileenigmatic smile/expression etc• She smiled that enigmatic smile again as I countered with my bishop's pawn.• His sometimes enigmatic expression and behaviour were likened to that of the sphinx in cartoonists' caricatures.• He didn't say anything, he just smiled his quiet, enigmatic smile and returned to his paper.• His face wore that same enigmatic smile, but he did not speak.• Rafiq did not speak but stood looking at his two colleagues, an enigmatic smile on his face. 