The word "slummiest" refers to a place or area that is run-down, impoverished, or neglected. However, its antonyms are words that describe the opposite of these qualities. Some of the antonyms for "slummiest" include affluent, prosperous, upscale, luxurious, and posh. These words are used to describe places that are well-maintained, clean, and attract people of higher social status. The antonyms of "slummiest" imply that these places are modern, developed, and offer better living standards. By using these opposite words, we can appreciate the stark difference between the two types of areas and understand the importance of uplifting impoverished neighborhoods.