The correct spelling of the word "un excessive" is actually "unexcessive". It means not excessive or moderate. The IPA phonetic transcription for this word is /ʌnɪkˈsɛsɪv/ or "un-ik-ses-iv". The "un" prefix indicates negation, while the "excessive" root word is spelled with a single "s" followed by two consonants, "c" and "s", which is a common spelling pattern in English. Therefore, the correct spelling of this word is "unexcessive".