Definition of Impenetrable

not capable of being entered

Examples of Impenetrable in a sentence

If the castle is truly impenetrable, our enemies will never gain access to the king.  🔊

Parents will love our company’s impenetrable security system.  🔊

Since the jungle was impenetrable, we had to find an alternate route to the village.  🔊

Do you think the train company will be able to clear a path through the impenetrable mountain?  🔊

Without a sledgehammer, there is no way we can break through the impenetrable wall.  🔊

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