The antonyms for the word "re constructing" are "destroying," "demolishing," and "ruining." While the process of reconstruction involves rebuilding or restoring something that has been damaged or destroyed, its opposites depict the act of dismantling, tearing down, or causing irreparable damage to structures or systems. For instance, instead of reconstructing a dilapidated building, one could choose to demolish it completely or avoid rebuilding altogether. Similarly, in the cases of social, economic, or political systems, the aim of reconstruction is to bring positive changes to a community, while its opposites spell out negative consequences such as chaos, division, and destruction.