The term "most halfformed" refers to something that is incomplete, lacks clarity, or is unpolished. Its antonyms would include words such as refined, polished, complete, thorough, precise, and distinct. These words highlight the opposite features of "most halfformed" suggesting the idea of something that is finished, well-crafted, well-defined, and well-executed. Refined implies that all the necessary details are in place, polished suggests something smooth and shiny, complete means that nothing is lacking, thorough denotes attention to detail and completeness, precise speaks of exactness, and distinct conveys an idea of clear and well-defined attributes. All these words represent the opposite of something that is "most halfformed.