The spelling of the word "Chelsa" can cause confusion due to its unique pronunciation. In IPA phonetic transcription, the word is pronounced as /ˈtʃɛlsə/. The "ch" in the beginning is pronounced with a "ch" sound, like in "church." The "e" in the middle is pronounced as a short "e" sound, while the following "s" is pronounced with a soft "s" sound. The final "a" is pronounced with a neutral "uh" sound. Therefore, the correct spelling of this word is "Chelsa," pronounced with four syllables.