The pronunciation and spelling of the word "is side" can be a bit tricky for non-native speakers. The correct pronunciation is [ˈɪz ˌsaɪd]. The first syllable sounds like the word "is" and the second syllable sounds like the word "side." The tricky part is the spelling of the first syllable, which ends in the letter "s." It is easy to mistake it for the letter "z," but it is actually pronounced as "s." Remembering this detail will help you spell this word correctly every time.