1. impermeable
I saw these artificial groups as static and impermeable.
an impermeable membrane
Anglais mot "nieprzepuszczalne"(impermeable) se produit dans des ensembles:
Kolokwium - water system2. Impervious
an impervious layer of basaltic clay
He wasn’t even upset when she called him stupid, he’s impervious to insults.
The lock was a mechanical style, impervious to electronic lock breaking.
Galoshes are impervious to water.
A house that keeps out rain and dew and is impervious to heat and cold is a wonderful thing.
3. unflappable
She's totally unflappable - you have to be when working in such a high-pressure environment.
I’m very unflappable.
Nothing on Wall Street can upset our unflappable chairman.
The great thing about Suzy is that even if everything is going wrong, she's completely unflappable.