insulate

The roots insulate and protect them from things like mantle plumes that could melt or break them apart from below.

Meanwhile, ancient Persians built shallow insulated pools of water and utilized a technique known as sky cooling.

In 2008, the Department of Water and Power began developing a replacement project, this time using newer cable insulated with polyethylene instead of high pressure oil.

And that is sometimes true in the brain and there are hardwired connections in the brain and they're myelinated, which is basically a way of insulating kind of the neuronal connections for faster information transmission.