Boggier is a word used to describe something that is soft, wet, and muddy. Synonyms for this word include marshy, swampy, mirey, and sodden. When describing an area that is difficult to navigate due to its wet and muddy terrain, words such as quagmire, slough, and bog can also be used. Additionally, if you want to convey a sense of dirt or grime, words such as grimy, filthy, and muddy can be used. These synonyms can be useful when trying to paint a vivid picture of the environment or to add depth and detail to your writing.