1.+ substance不能透过的；不可渗透的；防渗漏的
a layer of impervious rock不透水岩石层
The floor covering you select will need to be impervious to water.你选择的地板材料必须是防水的。
2.impervious to sth
person ++ criticism, pressure, charm对…无动于衷的；system +不受... 影响的
She seems almost impervious to criticism.看上去她对于批评几乎无动于衷。
It became imperative that the police should be impervious to pressure.警察必须能顶住压力, 这是极其重要的。
He was impervious to the charm and eloquence of Fletcher.他不为弗莱彻的魅力和口才所动。
The political system there has been impervious to all suggestions of change.所有变革建议对那里的政治体系而言都是徒劳。