Impenetrable (en. Impenetrable)

/imenetɾaˈβle/

Synonyms

Slang Meanings

Something that is very difficult to understand.
That riddle is so impenetrable that I can't solve it.
Ese acertijo es tan impenetrable que no puedo resolverlo.
A person who is closed off and does not share their thoughts.
He has always been impenetrable with his emotions.
Siempre ha sido impenetrable con sus emociones.