The word "de finer" is spelled as two separate words, "de" and "finer." In IPA phonetic transcription, "de" would be transcribed as /də/, with a schwa sound for the first syllable, and "finer" would be transcribed as /ˈfaɪnər/, with the stress on the first syllable and a long "i" sound in the second syllable. Therefore, the correct spelling for this word would be "definer," which means to clarify or explain the meaning of something.