The word "Ariterin" is spelled with a double 'r' and a single 't' in the middle. The pronunciation is /ˌærɪˈtɛrɪn/, with stress on the second syllable. The reason for this spelling is likely related to the origin of the word, although without further information it is difficult to say for sure. Phonetic transcription is a useful tool for understanding the spelling of words, as it helps to break down the sounds and syllables of the word.