impervious
adj.impossible to damage, change, or influence. You use this to describe something that stays the same no matter what happens to it.
adj.impenetrable or resistant to damage, influence, or change. Often used to describe materials that do not allow liquids to pass through or to describe people who remain unaffected by criticism.
“The waterproof jacket is impervious to rain.”
“The old stone walls were impervious to the heavy storms that battered the village for days.”
“Despite the intense public scrutiny and constant media pressure, the CEO remained impervious to criticism, maintaining a steady and confident leadership style throughout the crisis.”
“Other research shows that protective PVC gloves actually can break down as temperatures increase and become less impervious to the chemicals.”
“To deal with the settling, Peters and his team developed flexible flooring lined with an impervious three-ply fabric.”
From Latin impervius (“that cannot be passed through”), from in- (“not”) + pervius (“letting things through”).
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.