Answer:
circulate
Step-by-step explanation:
"Circulate" is a verb meaning to move or flow in a circular pattern or to pass from place to place or person to person. The root of the word "circulate" is "circulo," which comes from the Latin word "circulus," meaning "circle."
In the word "circulator," the suffix "-tor" is added to the root word "circulate" to form a noun that means "a device or machine that circulates something." For example, a circulator pump is a device that circulates hot water through a heating system. In this case, the word "circulator" is formed by adding the suffix "-tor" to the verb "circulate," which creates a noun referring to something or someone that performs the action of the verb.