The spelling of the word "most nidorous" is relatively straightforward once one understands the pronunciation of the two key terms. "Most" is pronounced with a long "o" sound, as in "boat," and a soft "s," as in "most relief." Meanwhile, "nidorous" is spelled phonetically as "nai-dor-uhs," with emphasis on the second syllable and a pronounced "ai" sound. The term means "smelling strongly," and its spelling reflects its Latin origins. Together, "most nidorous" refers to something with an extremely potent or pervasive odor.