Insulator (noun)

A material or substance that does not conduct electricity or heat and is used to prevent the loss of energy or the transfer of heat or sound.

Origin:

Late 19th century: from in- 'not' + latin conductor 'conductor'.

Examples:

1. The insulator kept the electrical wiring safe and prevented any short circuits.
2. The walls of the freezer were filled with insulator to keep the cold air inside.
3. Insulators are essential for many industrial and scientific applications.
4. Some common insulators include glass, rubber, and air.
5. The insulator in his gloves kept him safe from electrical shock.