形容词

1. 无动于衷的;不受影响的
If you are impervious to someone's actions, you are not affected or influenced by them.

2. 防渗漏的;不能渗透的;不能穿过的
Something that is impervious to water, heat, or a particular object is able to resist it or stop it passing through it.

1. not admitting of passage or capable of being affected

e.g. a material impervious to water
someone impervious to argument

Synonym: imperviable