impervious in inglese:

impenetrable darkness; an impenetrable jungle

sort of impenetrable, and you can't understand they behaviours (The piano characters)

1) Outside, the fog was thick and impenetrable. an impenetrable barrier 2) Some of the lyrics on their latest album are completely impenetrable

Carbone seemed unaffected by the crowd's hostility towards him.

her effortless, unaffected charm

The town was unaffected by the flood.

Mr. Bingley was good-looking and gentlemanlike; he had a pleasant countenance, and easy, unaffected manners.