What is another word for impassable?

Need synonyms for impassable? Here's a list of similar words from our thesaurus that you can use instead.

Adjective
Impossible to travel along or over
“This range of hills was impassable for early settlers and stopped westward expansion.”
Adjective
Too powerful to be defeated or overcome
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Adjective
Unable to be achieved or realized
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Adjective
Unable to be physically reached, especially of a location
Adjective
Closed at one end, or having a dead end
Adjective
Crowded or packed closely together
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