The spelling of the name "Kassidie" can be explained through IPA phonetic transcription. The first syllable is pronounced as /kæs/ with the "a" sound being short and the "s" being emphasized. The second syllable, "idie," is pronounced as /aɪdi/ with an "eye" sound for the "i" and "die" pronounced as expected. This unique combination of sounds creates the distinctive spelling of the name "Kassidie."