The word "pro-duct" refers to a physical item or object that has been manufactured or produced. Its antonyms can be terms like undoing or dismantling, implying the reversal of the action of creating or bringing something into existence. Another possible antonym for "pro-duct" could be the verb "destroy" which means to damage beyond repair or get rid of something intentionally. Additionally, words like disassemble, disintegrate, break-up, and dissolve could also be antonyms to "pro-duct". These words juxtapose the concept of building and assembling with destroying and decomposing, providing a contrast to the original notion of bringing something into existence.