enigmatic

/ˌɛnɪɡˈmætɪk/adjective

Mysterious and difficult to interpret or figure out.

Example sentence

“She gave an enigmatic smile and refused to say where she'd been.”

The Mona Lisa's smile is the textbook example: 'enigmatic smile' is a set phrase. It describes what invites and resists interpretation.

Related words

enlightenTo shine light on something; to provide it with light.enigmaA person or thing that is mysterious and very hard to understand or explain.enlistTo sign someone up on an official list or roll; to join or recruit into a group, especially the military.enhanceTo make something better, stronger, or more valuable.enmityA deep feeling of hatred or hostility toward someone, like that between enemies.engulfTo swallow up or completely cover something.