Antonyms for the word "re assembling" can include terms such as "disassembling," "dismantling," and "taking apart." These words all imply the opposite action of physically putting something back together in a specific order. Rather than reassembling, the opposite may involve breaking something down or pulling it apart. These actions may be necessary for a variety of reasons, such as repairs, renovations, or recycling. While reassembling implies that something had already existed in a particular form, dismantling involves a more destructive process that separates the various components or pieces that make up the whole, often for salvage purposes or to dispose of unwanted items.