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TOEFL BNC: 33124 COCA: 26837

impermeable

adjective
/ɪmˈpɜːmiəbl/
/ɪmˈpɜːrmiəbl/
(specialist)
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  1. impermeable (to something) not allowing a liquid or gas to pass through不可渗透的;不透气的;不透水的
    • impermeable rock不透水的岩石
    opposite permeable
    • The insulating material should be impermeable to water vapour.绝缘材料应该不透水蒸气。
    Word Originlate 17th cent.: from French imperméable, or from late Latin impermeabilis, from in- ‘not’ + permeabilis (from permeare ‘pass through’, from per- ‘through’ + meare ‘pass, go’).

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