impervious to

Existing regulations, it says, are “ineffective, costly, opaque, and largely impervious to reform.”

The building's imposing façade and domed turrets may make it seem as though the school is impervious to change, but today it’s in the crosshairs of the plans by the new Labour government to raise taxes on private schools.

For the U.S., the measure of success going forward should not be how progressive Afghan society is — centuries of history have shown that Afghanistan is impervious to foreign designs — but whether the U.S. can still defend itself against terrorism emanating from Afghanistan.

America is not a human enterprise; it is an idea, and therefore blissfully impervious to human foibles, shenanigans, and whines.

Prinzhorn suggested that audiences responded to Hitler’s rhetorical devices — volume, rhythm, modulation, repetition — emotionally rather than rationally, which rendered him impervious to attack by political opponents.