insulate

To prevent the passage of heat, electricity, or sound into or out of, especially by surrounding or covering with a nonconducting material.

To cause to be in a detached or isolated position. synonym: isolate.

To make an island of (a place) by surrounding it with water.

To place in an isolated situation or condition; set apart from immediate contact or association with others; detach; segregate.

In electricity and thermotics, to separate, as an electrified or heated body, from other bodies by the interposition of a non-conductor; more specifically, in the case of electricity, to separate from the earth (since an electrified body tends to part with its electricity to the earth).