enigmatic

Definitions

Difficult to interpret or understand; mysterious.

Puzzling or inexplicable in nature or character.

Examples

The enigmatic stranger left the party without saying a word to anyone.

Scientists are still trying to decipher the enigmatic signals coming from the distant galaxy.

She wore an enigmatic smile that made it impossible to tell what she was truly thinking.

Synonyms

mysterious cryptic puzzling obscure inscrutable perplexing baffling

Antonyms

clear obvious explicit understandable plain transparent intelligible