The correct spelling of the word "more nidorous" is /mɔːr nᵻˈdɔːrəs/. This word is derived from Latin (nidor) and Middle English (nydour), meaning "a strong unpleasant smell". The combination of the prefix "more" and the adjective "nidorous" creates a comparative phrase that indicates an even stronger odor than before. The use of IPA phonetic transcription helps to accurately represent the pronunciation and spelling of this word, making communication clear and precise.