transcription, транскрипция: [ ɪmpenɪtrəb(ə)l ]
1.
If you describe something such as a barrier or a forest as impenetrable , you mean that it is impossible or very difficult to get through.
...the Caucasus range, an almost impenetrable barrier between Europe and Asia.
ADJ : usu ADJ n
2.
If you describe something such as a book or a theory as impenetrable , you are emphasizing that it is impossible or very difficult to understand.
His books are notoriously impenetrable.
= incomprehensible
ADJ [ emphasis ]
• im‧pen‧etrably
...impenetrably detailed reports on product sales.
= incomprehensibly
ADV : ADV adj