The spelling of the word "most complanate" can be explained using the IPA (International Phonetic Alphabet) phonetic transcription. The word is pronounced as /mʌʊst kəmˈpleɪ.neɪt/, with the stress on the second syllable. "Complanate" means flattened or level, and "most" serves as an intensifier to describe the degree of flatness. The spelling of this word is quite straightforward, with the main focus on correctly pronouncing the stressed syllable in "complanate." Overall, "most complanate" is a term used to describe a surface that is extremely level or flattened.