The spelling of the word "Kaitrine" can be explained through the use of IPA (International Phonetic Alphabet) phonetic transcription. The first syllable "kai" is pronounced as /kaɪ/, which represents the sound of the letter "a" as in "cat" and the long "i" sound. The second syllable "trine" is pronounced as /trin/, which represents the sound of the letter "t" followed by the sound of the letter "r" and the long "i" sound. Therefore, "Kaitrine" is spelled using the combination of the sounds of those particular letters.