English dictionary

impervious

/I/m'p/[@]/rv/i//@/s/

Definitions, examples, synonyms and antonyms from WordNet 3.0.

adjective

not admitting of passage or capable of being affected

adj.all

Examples
A material impervious to water.

Someone impervious to argument.

Synonyms imperviable

Antonyms pervious

Source: WordNet 3.0
Not pervious; not admitting of entrance or passage through; as, a substance <i>impervious</i> to water or air.

adjective

Source: webster1913