Definitions

1. adjective

not allowing liquid, water, or air to pass through; resistant to moisture or wet conditions

“The waterproof coat made me impervious to the rain.”

2. noun

a person who is impervious to something, especially an emotion

“The impervious teenager didn’t seem to be affected by his parents’ divorce.”

3. verb

to make (something) impervious to moisture or wet conditions

“The coating will impervious the material to water damage.”

4. adverb

in a way that is not affected by something, especially an emotion

“She walked imperviously through the park, ignoring the people staring at her.”