inscrutable

Definitions

Impossible to understand or interpret; mysterious.

Having an expression that does not reveal one's thoughts or feelings.

Examples

The detective found the suspect's inscrutable expression impossible to read during the interrogation.

Ancient hieroglyphics remained inscrutable to scholars for centuries until the discovery of the Rosetta Stone.

Synonyms

enigmatic mysterious impenetrable cryptic unfathomable obscure puzzling

Antonyms

obvious transparent clear intelligible understandable plain evident