Longman Dictionary of Contemporary English homepage

impenetrable

 adjective
     
im‧pen‧e‧tra‧ble
1 impossible to get through, see through, or get into:
The trees formed a dark and impenetrable barrier.
the impenetrable blackness of the night
2 very difficult or impossible to understand:
impenetrable legal jargon
—impenetrably adverb
—impenetrability noun [uncountable]
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

Dictionary pictures of the day
Do you know what each of these is called?
What is the word for picture 1? What is the word for picture 2? What is the word for picture 3? What is the word for picture 4?
Click on any of the pictures above to find out what it is called.

Explore our topic dictionary

Browse the dictionary