The spelling of the word "Colwin" can be explained using the International Phonetic Alphabet (IPA). The first syllable "Col" is pronounced with an open-mid back rounded vowel /ɔ/ followed by the consonant /l/. The second syllable "win" starts with a voiced labiodental fricative /v/ and ends with the nasal consonant /n/. The stress falls on the first syllable, making it pronounced as /ˈkɔlwɪn/. This phonetic transcription helps us accurately spell and pronounce the word "Colwin".