im·per·me·a·ble
adjective/ɪmˈpɜːmiəbl/
/ɪmˈpɜːrmiəbl/
(specialist)- impermeable (to something) not allowing a liquid or gas to pass through
不能渗透的；不透气的；不透水的 - impermeable rock
不透水的岩石 - The insulating material should be impermeable to water vapour.
绝缘材料应不透水蒸气。
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’). - impermeable rock