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- Synonyms for "Impenetrable" on English
Translate Text 
Translate Files Impenetrable
/ɪmˈpɛnɪtrəbl/
Synonyms
- impervious
- opaque
- sealed
- inscrutable
- unfathomable
Slang Meanings
So complex that no one can understand it.
His explanation was so impenetrable that I just nodded and smiled.
A person who is very private and difficult to read.
She's got an impenetrable personality; you can never tell what she's thinking.