The spelling of the word "Winstella" is based on the pronunciation of its individual sounds. Using the International Phonetic Alphabet (IPA), "Win" is spelled /wɪn/ (with the "w" pronounced like "w" in "water" and the "i" like "i" in "bit"), while "stella" is spelled /stɛlə/ (with the "s" pronounced as "s" in "sit" and the "a" as "a" in "cat"). When these two sounds are combined, we get the distinctive spelling of "Winstella".