The spelling of the word "croswell" is determined by its pronunciation, which can be described using the International Phonetic Alphabet (IPA). The word can be divided into two parts: "cros" and "well". The first syllable, "cros", is pronounced with the IPA symbols /krɒs/, where the "k" sound is followed by a "r" and "o" that is pronounced like "aw". The second syllable, "well", is pronounced as /wɛl/, with a short "e" sound and a "w" sound at the beginning. Together, these sounds result in the unique spelling of "croswell".