The spelling of the word "capitalsin" seems confusing, but it can be easily deciphered using the International Phonetic Alphabet (IPA) transcription. The first syllable "cap" is pronounced as /kæp/, similar to the word "cap". The second syllable "i" is pronounced as /ɪ/, as in "sit". The final syllable "talsin" is pronounced as /tɔlsɪn/, with the stress on the second syllable. Phonetically, the word seems to be a combination of "capital" and "sin", but its actual meaning and usage remain unclear.