impenetrable

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impenetrable /ɪmˈpɛnətrəbəl/ adjective
impenetrable
/ɪmˈpɛnətrəbəl/
adjective
Learner's definition of IMPENETRABLE
[more impenetrable; most impenetrable]
: impossible to pass or see through
: impossible to understand

— impenetrability

/ɪmˌpɛnətrəˈbɪləti/ noun [noncount]

— impenetrably

/ɪmˈpɛnətrəbli/ adverb
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