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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.
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.
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.
Lexical Tree
impenetrableness
impenetrable
penetrable
penetr
