- 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
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’).