Antonyms for "re-constructing" include deconstructing, dismantling, destroying, demolishing, tearing down, and ruining. These are all actions that involve tearing something apart or reducing it to a non-existent state. While reconstructing refers to building something again, deconstructing refers to breaking it down into its individual parts. Similarly, while reconstructing may involve repairing or restoring something, dismantling refers to taking it apart piece by piece. Both reconstructing and deconstructing are essential components of many construction projects, and understanding their distinctions is crucial to ensuring that the end result meets the necessary requirements.