The term "most unthorough" is used to refer to something that is incomplete or insufficiently done. The antonyms for this word could be "thorough," "detailed," "comprehensive," "meticulous," "precise," "methodical," "systematic," "complete," "thoroughgoing," "exhaustive," and "rigorous." These words express the opposite meaning of the original term, indicating that the task or activity has been carried out with careful attention and diligence. Using the antonyms of "most unthorough" can help convey that something has been done completely, as opposed to the absence of detail and thoroughness. By using more precise and descriptive words, you can improve your writing or communication skills.