The spelling of the word "rutten" is determined by its pronunciation. Using the International Phonetic Alphabet (IPA), we can transcribe the word as /ˈrʌt(ə)n/. In this transcription, the symbol /r/ represents the "r" sound, while the symbol /ʌ/ represents the "uh" sound, like in the word "but." The symbol /t/ represents the "t" sound, while the symbol /ə/ represents the "uh" sound again. Finally, the symbol /n/ represents the "n" sound. Therefore, we spell "rutten" as such to represent its distinct phonemic patterns.
The word "rutten" originated from Middle English "rut(t)en", which evolved from Old English "hrotian". It is derived from the Proto-Germanic word "hrutōną", meaning "to snore, roar, bellow". This root ultimately comes from the Proto-Indo-European base "*kreuə-", which has the sense of "to make noise, roar". Over time, the spelling and pronunciation of "rutten" have changed, but the word has retained its original meaning of a deep or resonant noise.