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impermeable

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impermeable/ɪmˈpɚmijəbəl/adjective
impermeable
/ɪmˈpɚmijəbəl/
adjective
Learner's definition of IMPERMEABLE  
[more impermeable; most impermeable]technical
: not allowing something (such as a liquid) to pass through

— impermeability

/ɪmˌpɚmijəˈbɪləti/noun,[noncount]
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