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impenetrable
01
not capable of being entered, pierced, or passed through
Formal
Examples
The thick fog made the forest impenetrable, obscuring visibility.
The fortress was surrounded by an impenetrable wall, making it difficult for invaders to breach.
1.1
so dense or thick that little or no light can pass through
Examples
The impenetrable canopy blocked all sunlight from reaching the forest floor.
Heavy curtains made the room impenetrable to daylight.
02
extremely difficult to fully comprehend
Examples
The professor 's lectures on quantum mechanics were so impenetrable that most students struggled to grasp the concepts.
The legal document was filled with impenetrable jargon, making it nearly impossible for the average person to understand.
Lexical Tree
impenetrableness
impenetrable
penetrable
penetr
