impervious

“We have to have a larger portion of our groundwater recharge coming from managing rainwater, in getting rid of impervious surfaces and letting it infiltrate,” Winter said.

Impervious sheets of plastic cannot provide this service.

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

Providence’s alleged actions suggest that state laws protecting abortion rights are not impervious — and that would especially be so if Republicans regain the White House and control of Congress in the coming election.

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.