It comes from the Greek word "thermos," which means "hot" or "warm."
Here are some examples of words that use the root "therm":
* Thermometer: A device for measuring temperature.
* Thermodynamics: The branch of physics that deals with heat and its relation to other forms of energy.
* Thermal: Relating to heat.
* Thermos: A container designed to keep hot liquids hot and cold liquids cold.
* Hyperthermia: A condition in which the body temperature is abnormally high.
* Hypothermia: A condition in which the body temperature is abnormally low.