In terms of business:
* Service: A product is a tangible good, while a service is an intangible activity.
* Raw materials: Products are made from raw materials.
* Input: Products are outputs, while inputs are what goes into creating them.
In terms of mathematics:
* Factor: In multiplication, products are the result of multiplying factors.
* Sum: The opposite of multiplication is addition, where the result is called a sum.
In terms of everyday usage:
* Output: If "product" refers to the result of something, its opposite could be "input" or "cause."
* Destruction: If "product" implies creation, the opposite might be destruction.
To understand the opposite of "product" accurately, you need to consider the specific context in which it is used.