The correct spelling of the word "inaddition" is actually two separate words: "in addition". The first syllable, "in", is pronounced as /ɪn/, while the second syllable, "addition", is pronounced as /əˈdɪʃ(ə)n/. It is important to spell words correctly as it ensures clear communication and understanding between individuals. Phonetic transcription helps to accurately represent the sounds in a word, aiding in correct pronunciation and spelling. So, remember to always spell words correctly and use phonetic transcription as a helpful tool.