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impermanent
impermeable
impermissible
impersonal
impersonalize
impersonate
impertinent
imperturbable
impervious
impetigo
impetuosity
impetuous
impetus
impf.
Imphal
impi
impiety
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impervious

im·per·vi·ous [ im púrvee əss ]


adjective 
Definition:
 
1. not responsive: remaining unmoved and unaffected by other people's opinions, arguments, or suggestions
He was impervious to the growing resentment among the staff.

2. not letting something through: not allowing passage into or through something
impervious to damp

[Mid-17th century. < Latin impervius< pervius (see pervious)]

im·per·vi·ous·ly adverb
im·per·vi·ous·ness noun
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