This root is derived from the Latin word "calidus", which itself has the same meaning.
Here are some examples of English words that use the "calid" root:
* Calid (adjective) - hot or warm
* Calidity (noun) - the state of being hot or warm
* Caliduct (noun) - a duct for hot air or water
* Calidarium (noun) - a hot room in a Roman bathhouse