"Deconstruction" is the most commonly used antonym for "re-constructions." It refers to the process of taking apart or breaking something down. "Destruction" can also be considered an antonym since it implies the act of destroying, damaging or tearing down. "Neglect" is another opposite of "re-construction" since it means to ignore, abandon or not maintain something. "Abstention" refers to the deliberate act of abstaining from doing or undertaking something. "Negligence" denotes the lack of attention or care towards something, which can result in deterioration or decay. Finally, "dismantling" is an antonym for "re-construction", referring to taking apart something that was previously put together.