The spelling of the word "most nibbling" can be explained using the IPA phonetic transcription. The first syllable "most" has a long "o" sound as in "mōst." The second syllable "nibbling" has a short "i" sound as in "nĭbbling." The double "b" and "l" indicate a stressed syllable, making the word "nibbling" more prominent than "most." Overall, the word "most nibbling" refers to a particular type of snacking behavior where small bites are taken repeatedly.