The spelling of the word "Colbourne" may seem confusing to some individuals. However, the IPA (International Phonetic Alphabet) phonetic transcription provides a clear explanation of how the word is pronounced. The correct pronunciation of "Colbourne" is /kɒl.bən/. The letter "o" is pronounced as /ɒ/ and the letter "u" is not pronounced. The "e" at the end is silent, so the word ends with the sound /n/. With this understanding of phonetics, spelling the word "Colbourne" becomes easier to comprehend.