What does the suffix duct mean in product?

The word "product" doesn't actually have a suffix "-duct". It's a complete word on its own, meaning the result of a process or activity.

The suffix "-duct" usually refers to the act of leading or conveying, as in:

* Aqueduct: A structure that conveys water.

* Conductivity: The ability to conduct heat or electricity.

* Deductible: A portion of a loss that is not covered by insurance.

Therefore, "-duct" has no meaning in the context of "product."